/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/list-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:24:39,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:24:39,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:24:39,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:24:39,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:24:39,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:24:39,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:24:39,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:24:39,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:24:39,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:24:39,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:24:39,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:24:39,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:24:39,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:24:39,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:24:39,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:24:39,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:24:39,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:24:39,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:24:39,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:24:39,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:24:39,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:24:39,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:24:39,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:24:39,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:24:39,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:24:39,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:24:39,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:24:39,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:24:39,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:24:39,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:24:39,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:24:39,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:24:39,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:24:39,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:24:39,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:24:39,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:24:39,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:24:39,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:24:39,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:24:39,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:24:39,816 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 [2020-10-29 09:24:39,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:24:39,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:24:39,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:24:39,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:24:39,873 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:24:39,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:24:39,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:24:39,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:24:39,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:24:39,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:24:39,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:24:39,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:24:39,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:24:39,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:24:39,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:24:39,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:24:39,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:24:39,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:24:39,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:24:39,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:24:39,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:24:39,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:39,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:24:39,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:24:39,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:24:39,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:24:39,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:24:39,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:24:39,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:24:39,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:24:40,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:24:40,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:24:40,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:24:40,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:24:40,358 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:24:40,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2020-10-29 09:24:40,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cdae9a21/fbc050c4d6964e208221462f417af6bc/FLAG26dc05e9f [2020-10-29 09:24:41,220 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:24:41,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple-2.i [2020-10-29 09:24:41,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cdae9a21/fbc050c4d6964e208221462f417af6bc/FLAG26dc05e9f [2020-10-29 09:24:41,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cdae9a21/fbc050c4d6964e208221462f417af6bc [2020-10-29 09:24:41,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:24:41,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:24:41,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:41,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:24:41,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:24:41,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:41" (1/1) ... [2020-10-29 09:24:41,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a7f9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:41, skipping insertion in model container [2020-10-29 09:24:41,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:41" (1/1) ... [2020-10-29 09:24:41,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:24:41,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:24:41,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:42,017 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:24:42,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:42,166 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:24:42,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42 WrapperNode [2020-10-29 09:24:42,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:42,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:24:42,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:24:42,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:24:42,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (1/1) ... [2020-10-29 09:24:42,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:24:42,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:24:42,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:24:42,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:24:42,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (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 [2020-10-29 09:24:42,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:24:42,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:24:42,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:24:42,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:24:42,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:24:42,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-29 09:24:42,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-29 09:24:42,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-29 09:24:42,330 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:24:42,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:24:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:24:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:24:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:24:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:24:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:24:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:24:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:24:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:24:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:24:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:24:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:24:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:24:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:24:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:24:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:24:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:24:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:24:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:24:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:24:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-29 09:24:42,334 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-29 09:24:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-29 09:24:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:24:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:24:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:24:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:24:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:24:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:24:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:24:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:24:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:24:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:24:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:24:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:24:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:24:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:24:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:24:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:24:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:24:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:24:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:24:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:24:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:24:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:24:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:24:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:24:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:24:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:24:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:24:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:24:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:24:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:24:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:24:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:24:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:24:42,340 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:24:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:24:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:24:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:24:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:24:42,341 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:24:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:24:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:24:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:24:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:24:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:24:42,342 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:24:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:24:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:24:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:24:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:24:42,343 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:24:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:24:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:24:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:24:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:24:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:24:42,344 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:24:42,345 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:24:42,345 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:24:42,345 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:24:42,345 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:24:42,345 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:24:42,345 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:24:42,346 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:24:42,346 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:24:42,346 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:24:42,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:24:42,346 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:24:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:24:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:24:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:24:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:24:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:24:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:24:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:24:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:24:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:24:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:24:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:24:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:24:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:24:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:24:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:24:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:24:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:24:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:24:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:24:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:24:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:24:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:24:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:24:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:24:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:24:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:24:42,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:24:42,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:24:42,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:24:42,909 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:24:43,116 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:24:43,117 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:24:43,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:43 BoogieIcfgContainer [2020-10-29 09:24:43,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:24:43,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:24:43,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:24:43,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:24:43,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:24:41" (1/3) ... [2020-10-29 09:24:43,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f97374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:43, skipping insertion in model container [2020-10-29 09:24:43,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:42" (2/3) ... [2020-10-29 09:24:43,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f97374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:43, skipping insertion in model container [2020-10-29 09:24:43,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:43" (3/3) ... [2020-10-29 09:24:43,143 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-10-29 09:24:43,159 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:24:43,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:24:43,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:24:43,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:24:43,220 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:24:43,221 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:24:43,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:24:43,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:24:43,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:24:43,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:24:43,221 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:24:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-29 09:24:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:24:43,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:43,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:43,261 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 8074775, now seen corresponding path program 1 times [2020-10-29 09:24:43,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:43,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588033820] [2020-10-29 09:24:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:43,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:43,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:43,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:43,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:24:43,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-29 09:24:43,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:43,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:24:43,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:24:43,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:44,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:44,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:24:44,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:44,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:44,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588033820] [2020-10-29 09:24:44,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:44,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:44,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344403244] [2020-10-29 09:24:44,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:44,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:44,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:44,059 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-10-29 09:24:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:44,292 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-29 09:24:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:24:44,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 09:24:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:44,303 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:24:44,304 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:24:44,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:24:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:24:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-29 09:24:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:24:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-29 09:24:44,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2020-10-29 09:24:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:44,354 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-29 09:24:44,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-29 09:24:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:24:44,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:44,355 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:44,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:24:44,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1244663435, now seen corresponding path program 1 times [2020-10-29 09:24:44,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:44,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795382316] [2020-10-29 09:24:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:24:44,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-29 09:24:44,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:44,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:24:44,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:44,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:44,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:44,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:24:44,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:44,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:44,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795382316] [2020-10-29 09:24:44,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:44,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:24:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124753178] [2020-10-29 09:24:44,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:44,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:44,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:44,744 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-29 09:24:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:44,867 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-29 09:24:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:44,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-29 09:24:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:44,869 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:24:44,869 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:24:44,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:24:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:24:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-29 09:24:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:24:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-29 09:24:44,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-29 09:24:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:44,877 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-29 09:24:44,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-29 09:24:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:24:44,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:44,878 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:44,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:24:44,878 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash 927183817, now seen corresponding path program 1 times [2020-10-29 09:24:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:44,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524283533] [2020-10-29 09:24:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:45,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:45,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:24:45,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:45,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-29 09:24:45,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:45,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:24:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:24:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:24:45,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:45,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:45,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:45,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:45,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:45,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:45,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:45,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:45,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:45,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524283533] [2020-10-29 09:24:45,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:45,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:24:45,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817164172] [2020-10-29 09:24:45,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:24:45,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:24:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:24:45,439 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-29 09:24:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:45,761 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-29 09:24:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:45,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-29 09:24:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:45,763 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:24:45,763 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:24:45,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:24:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-29 09:24:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:24:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 09:24:45,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-10-29 09:24:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:45,772 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 09:24:45,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:24:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 09:24:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:24:45,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:45,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:45,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:24:45,773 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash 508750276, now seen corresponding path program 1 times [2020-10-29 09:24:45,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:45,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472241890] [2020-10-29 09:24:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:46,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:46,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:24:46,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:46,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-29 09:24:46,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:46,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:46,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:24:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:46,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:46,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:46,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:46,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:46,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:24:46,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:46,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:46,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472241890] [2020-10-29 09:24:46,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:46,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:46,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774635642] [2020-10-29 09:24:46,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:46,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:46,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:46,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:46,450 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-29 09:24:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:46,821 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-29 09:24:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:46,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-29 09:24:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:46,823 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:24:46,823 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:24:46,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:24:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-29 09:24:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:24:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-29 09:24:46,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-29 09:24:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:46,834 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-29 09:24:46,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-29 09:24:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:46,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:46,835 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:46,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:24:46,836 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -411287632, now seen corresponding path program 2 times [2020-10-29 09:24:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:46,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515860341] [2020-10-29 09:24:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:46,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:47,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-29 09:24:47,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:47,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:47,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:24:47,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:47,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:24:47,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:47,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:47,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:47,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515860341] [2020-10-29 09:24:47,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:47,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:47,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397488858] [2020-10-29 09:24:47,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:47,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:47,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:47,323 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-29 09:24:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:47,743 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-29 09:24:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:47,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-29 09:24:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:47,745 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:24:47,746 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:24:47,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:24:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2020-10-29 09:24:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:24:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-29 09:24:47,756 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-10-29 09:24:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:47,756 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-29 09:24:47,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-29 09:24:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:24:47,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:47,758 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:47,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:24:47,758 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:47,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1049776663, now seen corresponding path program 2 times [2020-10-29 09:24:47,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:47,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290743692] [2020-10-29 09:24:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:48,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:48,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:24:48,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 09:24:48,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:48,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:24:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:48,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:48,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:48,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:48,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:48,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:48,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290743692] [2020-10-29 09:24:48,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:48,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710342885] [2020-10-29 09:24:48,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:48,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:48,246 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-29 09:24:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:48,557 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-29 09:24:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:48,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:24:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:48,559 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:24:48,559 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:24:48,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:24:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-29 09:24:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:24:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-29 09:24:48,566 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-29 09:24:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:48,567 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-29 09:24:48,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-29 09:24:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:24:48,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:48,568 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] [2020-10-29 09:24:48,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:24:48,568 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 582189181, now seen corresponding path program 3 times [2020-10-29 09:24:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:48,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692555283] [2020-10-29 09:24:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:48,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:48,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:24:48,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-29 09:24:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:48,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:24:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:49,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:49,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:49,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:49,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:49,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:49,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:49,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:49,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:49,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:49,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692555283] [2020-10-29 09:24:49,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:49,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:49,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237727450] [2020-10-29 09:24:49,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:49,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:49,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:49,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:49,233 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-29 09:24:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:49,614 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-29 09:24:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:24:49,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-29 09:24:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:49,616 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:24:49,616 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:24:49,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:24:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:24:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-10-29 09:24:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:24:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-29 09:24:49,623 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-29 09:24:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:49,624 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-29 09:24:49,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-29 09:24:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:24:49,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:49,625 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:49,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:24:49,625 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:49,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1865318423, now seen corresponding path program 3 times [2020-10-29 09:24:49,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:49,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608580698] [2020-10-29 09:24:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:49,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:49,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:49,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:24:49,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-29 09:24:49,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:49,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:49,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:50,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:50,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:50,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:50,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:50,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:50,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:24:50,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:50,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:50,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:50,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:50,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608580698] [2020-10-29 09:24:50,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:50,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:50,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902556478] [2020-10-29 09:24:50,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:50,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:50,180 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-10-29 09:24:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:50,357 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-29 09:24:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:24:50,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-29 09:24:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:50,359 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:24:50,359 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:24:50,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:24:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-29 09:24:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:24:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-29 09:24:50,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-29 09:24:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:50,367 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-29 09:24:50,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-29 09:24:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:50,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:50,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:50,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:24:50,368 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 630288528, now seen corresponding path program 4 times [2020-10-29 09:24:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:50,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973372826] [2020-10-29 09:24:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:50,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:50,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:50,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:50,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:51,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:51,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:51,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:51,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:51,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973372826] [2020-10-29 09:24:51,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:51,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075030566] [2020-10-29 09:24:51,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:51,298 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-10-29 09:24:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:52,071 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-29 09:24:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:52,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-29 09:24:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:52,073 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:24:52,073 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:24:52,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:24:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:24:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-29 09:24:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:24:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-29 09:24:52,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-10-29 09:24:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:52,082 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-29 09:24:52,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-29 09:24:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:24:52,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:52,083 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:52,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:24:52,084 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:52,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1124602550, now seen corresponding path program 5 times [2020-10-29 09:24:52,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:52,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918071897] [2020-10-29 09:24:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:52,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:52,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:24:52,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:24:52,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:52,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:52,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:52,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:52,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:52,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:52,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:52,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:52,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:52,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:52,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:52,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:53,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918071897] [2020-10-29 09:24:53,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:53,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:24:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822846396] [2020-10-29 09:24:53,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:24:53,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:24:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:53,008 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-29 09:24:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:53,968 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-29 09:24:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:53,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-29 09:24:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:53,969 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:24:53,969 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:24:53,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:24:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:24:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-29 09:24:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:24:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-29 09:24:53,978 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 31 [2020-10-29 09:24:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:53,979 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-29 09:24:53,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:24:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-29 09:24:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:24:53,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:53,980 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:53,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:24:53,980 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:53,981 INFO L82 PathProgramCache]: Analyzing trace with hash -961141859, now seen corresponding path program 6 times [2020-10-29 09:24:53,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:53,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485681494] [2020-10-29 09:24:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:54,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:54,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:54,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:24:54,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 09:24:54,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:54,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:54,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:54,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:54,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:24:54,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:54,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:54,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:54,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:54,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:54,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:54,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:54,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:54,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:54,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485681494] [2020-10-29 09:24:54,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:54,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:54,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611204082] [2020-10-29 09:24:54,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:54,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:54,602 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 13 states. [2020-10-29 09:24:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:55,053 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-29 09:24:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:55,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-29 09:24:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:55,055 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:24:55,055 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:24:55,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:24:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-29 09:24:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:24:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-29 09:24:55,063 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-29 09:24:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:55,063 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-29 09:24:55,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-29 09:24:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:24:55,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:55,064 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:55,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:24:55,065 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1999996855, now seen corresponding path program 7 times [2020-10-29 09:24:55,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:55,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158763309] [2020-10-29 09:24:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:55,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:24:55,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:56,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:56,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:56,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:56,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:56,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:56,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158763309] [2020-10-29 09:24:56,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:24:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365042249] [2020-10-29 09:24:56,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:24:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:24:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:56,243 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2020-10-29 09:24:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:57,005 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-29 09:24:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:57,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-29 09:24:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:57,012 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:24:57,012 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:24:57,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:24:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:24:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-29 09:24:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:24:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-29 09:24:57,022 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2020-10-29 09:24:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:57,022 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-29 09:24:57,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:24:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-29 09:24:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:24:57,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:57,024 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:57,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:24:57,024 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash 635887727, now seen corresponding path program 8 times [2020-10-29 09:24:57,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:57,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33594748] [2020-10-29 09:24:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:57,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:57,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:24:57,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-29 09:24:57,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:57,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:24:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:24:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:58,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:58,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:58,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:58,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:58,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:58,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:58,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33594748] [2020-10-29 09:24:58,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:58,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:24:58,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761640681] [2020-10-29 09:24:58,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:24:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:58,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:24:58,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:58,050 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-29 09:24:58,778 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-29 09:24:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:59,087 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-29 09:24:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:24:59,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-29 09:24:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:59,088 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:24:59,089 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:24:59,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:24:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:24:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-29 09:24:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:24:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-29 09:24:59,097 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 35 [2020-10-29 09:24:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:59,097 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-29 09:24:59,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:24:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-29 09:24:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:24:59,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:59,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:59,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:24:59,099 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1830315798, now seen corresponding path program 9 times [2020-10-29 09:24:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:59,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891452723] [2020-10-29 09:24:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:24:59,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-29 09:24:59,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:24:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:24:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:00,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:00,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:00,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:00,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:00,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:00,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891452723] [2020-10-29 09:25:00,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:00,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:25:00,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965692963] [2020-10-29 09:25:00,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:25:00,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:25:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:25:00,190 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-29 09:25:00,696 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-29 09:25:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:01,198 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-29 09:25:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:25:01,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:25:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:01,199 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:25:01,200 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:25:01,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:25:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:25:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-29 09:25:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:25:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-29 09:25:01,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-10-29 09:25:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:01,214 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-29 09:25:01,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:25:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-29 09:25:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:25:01,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:01,216 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:01,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:25:01,217 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1659128994, now seen corresponding path program 10 times [2020-10-29 09:25:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:01,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858353809] [2020-10-29 09:25:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:01,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:01,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:01,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:25:01,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:01,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-29 09:25:01,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:01,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:25:01,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:02,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:25:02,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:02,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:02,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:02,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:02,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:02,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:02,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:02,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:02,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:02,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:02,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858353809] [2020-10-29 09:25:02,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:02,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:25:02,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685374469] [2020-10-29 09:25:02,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:25:02,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:02,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:25:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:25:02,661 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 17 states. [2020-10-29 09:25:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:03,402 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-29 09:25:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:25:03,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-29 09:25:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:03,403 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:25:03,403 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:25:03,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:25:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:25:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-29 09:25:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:25:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-29 09:25:03,414 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 38 [2020-10-29 09:25:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:03,414 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-29 09:25:03,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:25:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-29 09:25:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:25:03,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:03,416 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:03,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:25:03,416 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2038454103, now seen corresponding path program 11 times [2020-10-29 09:25:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:03,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463455899] [2020-10-29 09:25:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:04,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:04,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:25:04,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:04,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-29 09:25:04,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:04,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:04,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:25:04,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:04,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:25:04,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:25:04,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:04,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:04,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:04,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:04,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:04,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463455899] [2020-10-29 09:25:04,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:04,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:25:04,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180892090] [2020-10-29 09:25:04,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:25:04,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:25:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:25:04,852 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-29 09:25:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:05,596 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-29 09:25:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:25:05,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-29 09:25:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:05,598 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:25:05,598 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:25:05,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:25:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:25:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-29 09:25:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:25:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-29 09:25:05,606 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2020-10-29 09:25:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:05,606 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-29 09:25:05,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:25:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-29 09:25:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:25:05,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:05,607 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:05,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:25:05,607 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:05,608 INFO L82 PathProgramCache]: Analyzing trace with hash -917879281, now seen corresponding path program 12 times [2020-10-29 09:25:05,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:05,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022796315] [2020-10-29 09:25:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:05,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:06,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:06,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:25:06,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:06,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-29 09:25:06,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:06,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:25:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:06,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:25:06,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:07,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:07,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:07,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:07,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:25:07,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:07,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:07,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022796315] [2020-10-29 09:25:07,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:07,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:25:07,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936049274] [2020-10-29 09:25:07,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:25:07,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:25:07,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:25:07,332 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-10-29 09:25:08,182 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-29 09:25:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:08,710 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-29 09:25:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:25:08,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-29 09:25:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:08,712 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:25:08,712 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:25:08,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:25:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:25:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-29 09:25:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:25:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-29 09:25:08,734 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-29 09:25:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:08,734 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-29 09:25:08,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:25:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-29 09:25:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:25:08,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:08,737 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:08,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:25:08,737 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1225451966, now seen corresponding path program 13 times [2020-10-29 09:25:08,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:08,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351881857] [2020-10-29 09:25:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:09,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:09,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:25:09,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:09,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-29 09:25:09,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:09,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:09,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:25:09,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:25:10,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:10,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:10,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:10,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351881857] [2020-10-29 09:25:10,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:10,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:25:10,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455707931] [2020-10-29 09:25:10,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:25:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:25:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:25:10,443 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2020-10-29 09:25:11,105 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-29 09:25:11,463 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-29 09:25:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:12,256 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-29 09:25:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:25:12,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-29 09:25:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:12,258 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:25:12,258 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:25:12,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:25:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:25:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-29 09:25:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:25:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-29 09:25:12,268 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 44 [2020-10-29 09:25:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:12,268 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-29 09:25:12,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:25:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-29 09:25:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:25:12,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:12,269 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:12,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:25:12,270 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash -351141752, now seen corresponding path program 14 times [2020-10-29 09:25:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473377710] [2020-10-29 09:25:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:13,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:25:13,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:13,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:25:13,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:13,594 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-29 09:25:13,786 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-29 09:25:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:14,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:14,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:14,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473377710] [2020-10-29 09:25:14,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:14,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:25:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394035557] [2020-10-29 09:25:14,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:25:14,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:25:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:25:14,382 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-29 09:25:15,043 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-29 09:25:15,273 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-29 09:25:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:15,946 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-29 09:25:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:25:15,946 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-29 09:25:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:15,947 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:25:15,948 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:25:15,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:25:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:25:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-29 09:25:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:25:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-29 09:25:15,957 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 45 [2020-10-29 09:25:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:15,957 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-29 09:25:15,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:25:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-29 09:25:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:25:15,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:15,958 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:15,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:25:15,958 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash -72158289, now seen corresponding path program 15 times [2020-10-29 09:25:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:15,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607666616] [2020-10-29 09:25:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:16,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:16,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:25:16,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-29 09:25:16,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:16,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:25:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:17,159 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-29 09:25:18,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:18,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:18,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:18,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:18,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:18,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:18,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:18,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:18,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:18,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607666616] [2020-10-29 09:25:18,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:18,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:25:18,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357278303] [2020-10-29 09:25:18,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:25:18,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:25:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:25:18,128 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 19 states. [2020-10-29 09:25:18,711 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-29 09:25:19,047 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-29 09:25:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:19,760 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-29 09:25:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:25:19,760 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-29 09:25:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:19,761 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:25:19,762 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:25:19,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:25:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:25:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-29 09:25:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:25:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-29 09:25:19,770 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-29 09:25:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:19,771 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-29 09:25:19,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:25:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-29 09:25:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:19,771 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:19,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:25:19,772 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1386737829, now seen corresponding path program 16 times [2020-10-29 09:25:19,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:19,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244842048] [2020-10-29 09:25:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:20,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:25:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:20,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:25:20,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:21,316 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-29 09:25:21,772 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 09:25:22,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:22,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:22,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244842048] [2020-10-29 09:25:22,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:22,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:25:22,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724321605] [2020-10-29 09:25:22,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:25:22,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:22,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:25:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:25:22,457 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-29 09:25:23,024 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-29 09:25:23,318 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-29 09:25:23,719 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-29 09:25:23,992 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:25:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:24,591 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-29 09:25:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:25:24,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-29 09:25:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:24,593 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:25:24,593 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:25:24,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:25:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:25:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-29 09:25:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:25:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-29 09:25:24,602 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 48 [2020-10-29 09:25:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:24,603 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-29 09:25:24,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:25:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-29 09:25:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:25:24,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:24,603 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:24,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:25:24,604 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash 353752705, now seen corresponding path program 17 times [2020-10-29 09:25:24,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:24,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121956135] [2020-10-29 09:25:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:25,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:25,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:25:25,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:25,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-29 09:25:25,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:25,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:25:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:25:25,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:26,189 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-29 09:25:26,378 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-29 09:25:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:27,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:27,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:27,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:27,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:27,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:27,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:27,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:27,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:27,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121956135] [2020-10-29 09:25:27,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:27,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:25:27,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969429812] [2020-10-29 09:25:27,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:25:27,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:25:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:25:27,071 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-29 09:25:27,825 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-29 09:25:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:28,297 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-29 09:25:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:25:28,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-29 09:25:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:28,302 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:25:28,303 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:25:28,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:25:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-10-29 09:25:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:25:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-29 09:25:28,311 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-29 09:25:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:28,311 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-29 09:25:28,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:25:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-29 09:25:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:25:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:28,312 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:28,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:25:28,312 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1273417880, now seen corresponding path program 18 times [2020-10-29 09:25:28,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:28,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872027368] [2020-10-29 09:25:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:28,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:29,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1072 [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:25:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:25:29,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:29,894 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 09:25:30,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:30,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:30,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:30,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:30,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872027368] [2020-10-29 09:25:30,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:30,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:25:30,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051352384] [2020-10-29 09:25:30,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:25:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:25:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:25:30,681 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-29 09:25:31,394 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-29 09:25:31,566 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:25:31,878 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-29 09:25:32,232 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-29 09:25:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:32,891 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-29 09:25:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:25:32,891 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-29 09:25:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:32,893 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:25:32,893 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:25:32,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:25:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:25:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-29 09:25:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:25:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-29 09:25:32,903 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-29 09:25:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:32,903 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-29 09:25:32,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:25:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-29 09:25:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:25:32,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:32,903 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:32,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:25:32,904 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:32,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1492571124, now seen corresponding path program 19 times [2020-10-29 09:25:32,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:32,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888567793] [2020-10-29 09:25:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:33,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:34,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:25:34,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:34,662 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:25:34,954 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-29 09:25:35,256 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-29 09:25:35,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888567793] [2020-10-29 09:25:36,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:36,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:25:36,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448138849] [2020-10-29 09:25:36,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:25:36,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:25:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:25:36,028 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-10-29 09:25:36,640 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:25:37,009 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:25:37,385 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:25:37,670 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2020-10-29 09:25:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:38,307 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-29 09:25:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:25:38,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-29 09:25:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:38,309 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:25:38,309 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:25:38,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:25:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:25:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-10-29 09:25:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:25:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-29 09:25:38,320 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 52 [2020-10-29 09:25:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:38,320 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-29 09:25:38,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:25:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-29 09:25:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:25:38,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:38,321 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:38,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:25:38,321 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:38,322 INFO L82 PathProgramCache]: Analyzing trace with hash 764401093, now seen corresponding path program 20 times [2020-10-29 09:25:38,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:38,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33071653] [2020-10-29 09:25:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:39,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 858 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:25:39,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:39,768 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-29 09:25:40,016 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 09:25:40,298 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 09:25:40,510 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-29 09:25:41,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:41,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:41,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:41,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:41,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:41,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:41,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:41,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:41,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:41,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33071653] [2020-10-29 09:25:41,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:41,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:25:41,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454251338] [2020-10-29 09:25:41,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:25:41,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:25:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:25:41,341 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 22 states. [2020-10-29 09:25:41,999 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-29 09:25:42,413 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-29 09:25:42,625 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:25:42,913 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-10-29 09:25:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:43,880 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-29 09:25:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:25:43,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-29 09:25:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:43,882 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:25:43,882 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:25:43,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:25:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:25:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-29 09:25:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:25:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-29 09:25:43,890 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2020-10-29 09:25:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:43,891 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-29 09:25:43,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:25:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-29 09:25:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:25:43,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:43,891 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:43,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:25:43,891 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:43,892 INFO L82 PathProgramCache]: Analyzing trace with hash 320399009, now seen corresponding path program 21 times [2020-10-29 09:25:43,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:43,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531775304] [2020-10-29 09:25:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:45,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:45,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:25:45,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:45,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-29 09:25:45,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:45,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:45,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:25:45,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:45,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:25:45,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:45,725 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 09:25:46,044 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-29 09:25:46,259 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-29 09:25:46,543 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-29 09:25:46,711 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-29 09:25:46,893 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:25:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:47,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:47,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:47,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:47,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:47,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:47,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531775304] [2020-10-29 09:25:47,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:47,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:25:47,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514893764] [2020-10-29 09:25:47,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:25:47,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:25:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:25:47,623 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2020-10-29 09:25:48,278 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:25:48,662 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:25:48,856 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:25:49,098 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-29 09:25:49,307 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:25:49,670 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 104 [2020-10-29 09:25:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:50,627 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-29 09:25:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:25:50,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-29 09:25:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:50,629 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:25:50,629 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:25:50,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:25:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:25:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-29 09:25:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:25:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-29 09:25:50,640 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-10-29 09:25:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:50,640 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-29 09:25:50,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:25:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-29 09:25:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:25:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:50,641 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:50,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:25:50,641 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1299884012, now seen corresponding path program 22 times [2020-10-29 09:25:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254402546] [2020-10-29 09:25:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:25:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:25:51,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:52,389 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 09:25:52,535 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 09:25:52,744 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-29 09:25:52,924 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-29 09:25:53,161 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-29 09:25:53,403 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-29 09:25:53,657 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-29 09:25:54,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:54,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:54,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:54,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:54,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:54,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254402546] [2020-10-29 09:25:54,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:54,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:25:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940473521] [2020-10-29 09:25:54,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:25:54,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:25:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:25:54,507 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2020-10-29 09:25:55,158 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:25:55,567 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:25:55,780 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:25:56,051 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-29 09:25:56,274 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:25:56,632 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-29 09:25:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:57,797 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-29 09:25:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:25:57,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-29 09:25:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:57,799 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:25:57,799 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:25:57,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:25:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:25:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-10-29 09:25:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:25:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-29 09:25:57,810 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-10-29 09:25:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:57,810 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-29 09:25:57,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:25:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-29 09:25:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:25:57,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:57,811 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:57,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:25:57,812 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:57,812 INFO L82 PathProgramCache]: Analyzing trace with hash -259499686, now seen corresponding path program 23 times [2020-10-29 09:25:57,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:57,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871855221] [2020-10-29 09:25:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:57,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:59,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:59,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:25:59,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:59,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1588 [2020-10-29 09:25:59,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:59,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:25:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:25:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:00,169 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-29 09:26:00,479 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-29 09:26:00,757 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-29 09:26:01,119 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-29 09:26:01,583 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-29 09:26:02,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:02,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:02,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:02,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:02,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:02,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:02,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871855221] [2020-10-29 09:26:02,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:02,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:26:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695266020] [2020-10-29 09:26:02,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:26:02,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:26:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:26:02,437 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 26 states. [2020-10-29 09:26:03,092 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-29 09:26:03,400 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:26:03,817 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 81 [2020-10-29 09:26:04,064 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-29 09:26:04,450 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2020-10-29 09:26:04,665 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:26:05,006 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 92 [2020-10-29 09:26:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:06,086 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-29 09:26:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:26:06,087 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-29 09:26:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:06,088 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:26:06,089 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:26:06,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:26:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:26:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2020-10-29 09:26:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:26:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-29 09:26:06,101 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 59 [2020-10-29 09:26:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:06,102 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-29 09:26:06,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:26:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-29 09:26:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:26:06,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:06,102 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:06,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:26:06,103 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1129799361, now seen corresponding path program 24 times [2020-10-29 09:26:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:06,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046171760] [2020-10-29 09:26:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:07,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:07,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1472 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:26:07,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:08,066 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-29 09:26:08,296 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-29 09:26:08,428 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-29 09:26:08,655 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-29 09:26:08,808 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:26:09,050 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-29 09:26:09,250 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-29 09:26:09,463 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-29 09:26:09,620 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-29 09:26:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:10,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046171760] [2020-10-29 09:26:10,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:10,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:26:10,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829471150] [2020-10-29 09:26:10,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:26:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:26:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:26:10,500 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 25 states. [2020-10-29 09:26:11,280 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-29 09:26:11,700 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-29 09:26:12,191 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-29 09:26:12,726 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2020-10-29 09:26:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:14,057 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-29 09:26:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:26:14,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-29 09:26:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:14,059 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:26:14,059 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:26:14,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=137, Invalid=1755, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:26:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:26:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-29 09:26:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:26:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-29 09:26:14,070 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-29 09:26:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:14,070 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-29 09:26:14,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:26:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-29 09:26:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:26:14,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:14,071 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:14,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:26:14,071 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:14,071 INFO L82 PathProgramCache]: Analyzing trace with hash -103674221, now seen corresponding path program 25 times [2020-10-29 09:26:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:14,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342270070] [2020-10-29 09:26:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:14,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:15,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:15,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:26:15,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:15,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1574 [2020-10-29 09:26:15,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:15,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:15,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:26:15,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:15,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:26:15,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:16,461 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-29 09:26:16,609 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-29 09:26:16,869 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-29 09:26:17,052 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-29 09:26:17,363 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-29 09:26:17,600 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-29 09:26:18,058 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-10-29 09:26:18,617 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-29 09:26:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:19,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:19,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:19,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342270070] [2020-10-29 09:26:19,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:19,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:26:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87582091] [2020-10-29 09:26:19,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:26:19,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:26:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:26:19,628 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 27 states. [2020-10-29 09:26:20,320 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:26:20,644 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:26:20,996 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 09:26:21,486 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-10-29 09:26:21,753 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-29 09:26:22,184 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2020-10-29 09:26:22,537 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-29 09:26:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:23,627 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-29 09:26:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:26:23,628 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-29 09:26:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:23,629 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:26:23,629 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:26:23,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:26:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:26:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-29 09:26:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:26:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-29 09:26:23,644 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2020-10-29 09:26:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:23,644 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-29 09:26:23,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:26:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-29 09:26:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:26:23,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:23,645 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:23,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:26:23,646 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash -820131949, now seen corresponding path program 26 times [2020-10-29 09:26:23,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:23,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395121865] [2020-10-29 09:26:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:23,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:25,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:25,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:26:25,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:25,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1817 [2020-10-29 09:26:25,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:25,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:26:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:26:25,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:26,108 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-29 09:26:26,383 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-29 09:26:26,550 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:26:26,814 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-29 09:26:27,173 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-10-29 09:26:27,432 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-29 09:26:28,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:28,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:28,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:28,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:28,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395121865] [2020-10-29 09:26:28,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:28,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:26:28,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93336178] [2020-10-29 09:26:28,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:26:28,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:28,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:26:28,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:26:28,524 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-29 09:26:29,677 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-29 09:26:29,911 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:26:30,183 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-29 09:26:30,597 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-29 09:26:31,067 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2020-10-29 09:26:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:32,017 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-29 09:26:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:26:32,019 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-29 09:26:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:32,020 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:26:32,020 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:26:32,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:26:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:26:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-10-29 09:26:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:26:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-29 09:26:32,033 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-29 09:26:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:32,033 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-29 09:26:32,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:26:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-29 09:26:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 09:26:32,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:32,034 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:32,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:26:32,034 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash -766893382, now seen corresponding path program 27 times [2020-10-29 09:26:32,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:32,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823468158] [2020-10-29 09:26:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:32,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2165 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:26:34,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:34,825 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-29 09:26:35,061 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-29 09:26:35,336 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-29 09:26:35,486 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-29 09:26:35,727 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-29 09:26:35,892 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-29 09:26:36,143 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-10-29 09:26:37,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:37,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:37,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:37,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:37,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:37,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:37,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:37,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:37,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:37,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:37,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:37,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823468158] [2020-10-29 09:26:37,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:37,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:26:37,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879285140] [2020-10-29 09:26:37,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:26:37,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:26:37,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:26:37,443 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-29 09:26:38,366 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-29 09:26:38,589 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:26:38,861 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-29 09:26:39,084 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:26:39,360 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-29 09:26:39,613 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-29 09:26:40,073 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 113 [2020-10-29 09:26:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:41,561 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-29 09:26:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:26:41,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-29 09:26:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:41,563 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:26:41,563 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:26:41,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:26:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:26:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2020-10-29 09:26:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:26:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-29 09:26:41,580 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 65 [2020-10-29 09:26:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:41,581 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-29 09:26:41,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:26:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-29 09:26:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:26:41,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:41,582 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:41,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:26:41,582 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1228392890, now seen corresponding path program 28 times [2020-10-29 09:26:41,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:41,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377712921] [2020-10-29 09:26:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:41,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:44,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:44,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:26:44,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:44,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2797 [2020-10-29 09:26:44,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:44,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:44,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:26:44,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:44,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:26:44,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:45,293 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 09:26:45,595 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-29 09:26:45,724 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-29 09:26:45,978 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-29 09:26:46,163 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-29 09:26:46,447 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-29 09:26:46,659 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-29 09:26:46,993 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-29 09:26:47,258 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-29 09:26:47,658 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2020-10-29 09:26:47,941 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-29 09:26:48,209 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-29 09:26:48,424 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-29 09:26:49,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:49,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:49,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:49,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:49,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377712921] [2020-10-29 09:26:49,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:26:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065475881] [2020-10-29 09:26:49,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:26:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:49,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:26:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:26:49,342 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 29 states. [2020-10-29 09:26:50,317 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-10-29 09:26:50,566 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:26:50,902 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-29 09:26:51,201 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-29 09:26:51,590 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-29 09:26:51,933 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-29 09:26:52,328 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-29 09:26:52,675 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-29 09:26:53,239 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 119 [2020-10-29 09:26:53,997 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 108 [2020-10-29 09:26:54,673 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 111 [2020-10-29 09:26:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:55,561 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-29 09:26:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:26:55,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-29 09:26:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:55,563 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:26:55,563 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:26:55,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=197, Invalid=2353, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:26:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:26:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-29 09:26:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:26:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-29 09:26:55,581 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2020-10-29 09:26:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:55,581 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-29 09:26:55,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:26:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-29 09:26:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:26:55,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:55,582 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:55,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:26:55,582 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1879357133, now seen corresponding path program 29 times [2020-10-29 09:26:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:55,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488798782] [2020-10-29 09:26:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:55,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2063 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:57,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:26:57,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:58,297 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 09:26:58,580 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-29 09:26:58,721 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:26:58,959 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-29 09:26:59,134 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-29 09:26:59,563 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-29 09:26:59,796 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-29 09:27:00,042 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-29 09:27:00,225 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 09:27:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:01,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:01,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:01,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:01,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:27:01,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:01,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:01,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:01,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:01,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488798782] [2020-10-29 09:27:01,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:01,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:27:01,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356893502] [2020-10-29 09:27:01,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:27:01,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:27:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:27:01,346 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 28 states. [2020-10-29 09:27:02,064 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-29 09:27:02,283 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:27:02,546 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:27:02,807 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:27:03,148 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-29 09:27:03,453 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-29 09:27:03,923 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2020-10-29 09:27:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:05,383 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-29 09:27:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:27:05,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-29 09:27:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:05,384 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:27:05,385 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 09:27:05,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:27:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 09:27:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-29 09:27:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:27:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-29 09:27:05,400 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2020-10-29 09:27:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:05,401 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-29 09:27:05,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:27:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-29 09:27:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:27:05,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:05,401 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:05,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:27:05,402 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:05,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1641562675, now seen corresponding path program 30 times [2020-10-29 09:27:05,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:05,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849140135] [2020-10-29 09:27:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:27:07,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:07,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:27:07,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:07,957 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-29 09:27:08,193 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-29 09:27:08,476 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-29 09:27:08,705 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 09:27:09,119 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-29 09:27:09,640 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-29 09:27:09,806 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-29 09:27:10,138 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-29 09:27:10,400 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-29 09:27:11,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:11,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:11,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:11,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:11,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849140135] [2020-10-29 09:27:11,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:11,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:27:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763805642] [2020-10-29 09:27:11,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:27:11,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:27:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:27:11,346 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 30 states. [2020-10-29 09:27:12,660 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-29 09:27:12,961 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-29 09:27:13,609 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 112 [2020-10-29 09:27:13,880 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-29 09:27:14,156 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-29 09:27:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:15,400 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-29 09:27:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:27:15,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-29 09:27:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:15,402 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:27:15,402 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:27:15,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=186, Invalid=2166, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:27:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:27:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-29 09:27:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 09:27:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-29 09:27:15,420 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-10-29 09:27:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:15,421 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-29 09:27:15,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:27:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-29 09:27:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:27:15,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:15,422 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:15,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:27:15,422 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1006357274, now seen corresponding path program 31 times [2020-10-29 09:27:15,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288056463] [2020-10-29 09:27:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3228 [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:27:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:27:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:19,326 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 09:27:19,502 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-29 09:27:19,788 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 09:27:19,971 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-29 09:27:20,286 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-29 09:27:20,593 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-29 09:27:21,541 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-10-29 09:27:22,095 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2020-10-29 09:27:23,260 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2020-10-29 09:27:24,022 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 141 [2020-10-29 09:27:25,048 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2020-10-29 09:27:25,311 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-29 09:27:26,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:26,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:26,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:26,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:26,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:26,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:26,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:26,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:26,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:26,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:26,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:26,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:26,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288056463] [2020-10-29 09:27:26,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:26,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:27:26,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373741185] [2020-10-29 09:27:26,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:27:26,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:27:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:27:26,637 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-10-29 09:27:27,816 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-29 09:27:28,170 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-29 09:27:28,476 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-29 09:27:30,015 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 188 DAG size of output: 145 [2020-10-29 09:27:30,714 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 120 [2020-10-29 09:27:34,283 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 245 DAG size of output: 188 [2020-10-29 09:27:35,295 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 143 [2020-10-29 09:27:38,611 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 254 DAG size of output: 216 [2020-10-29 09:27:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:41,088 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-29 09:27:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:27:41,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-29 09:27:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:41,089 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:27:41,090 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:27:41,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=197, Invalid=2665, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 09:27:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:27:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-29 09:27:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:27:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-29 09:27:41,110 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2020-10-29 09:27:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:41,111 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-29 09:27:41,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:27:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-29 09:27:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:27:41,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:41,111 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:41,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:27:41,112 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:41,112 INFO L82 PathProgramCache]: Analyzing trace with hash 904396076, now seen corresponding path program 32 times [2020-10-29 09:27:41,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:41,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369058258] [2020-10-29 09:27:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:41,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:43,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 09:27:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:44,182 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-29 09:27:44,369 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-29 09:27:44,678 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-29 09:27:44,826 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:27:45,053 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 09:27:45,245 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-29 09:27:45,547 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-29 09:27:46,038 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-29 09:27:46,198 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-29 09:27:46,670 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2020-10-29 09:27:46,995 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-29 09:27:47,311 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-29 09:27:47,562 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-29 09:27:47,910 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 09:27:48,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:48,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:48,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:48,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:48,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:48,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:48,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:48,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:48,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369058258] [2020-10-29 09:27:48,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:48,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:27:48,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211670016] [2020-10-29 09:27:48,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:27:48,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:27:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:27:48,920 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2020-10-29 09:27:50,548 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-29 09:27:51,218 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2020-10-29 09:27:51,581 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-29 09:27:52,060 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-29 09:27:52,466 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-29 09:27:53,131 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 135 [2020-10-29 09:27:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:55,103 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2020-10-29 09:27:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:27:55,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-29 09:27:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:55,105 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:27:55,105 INFO L226 Difference]: Without dead ends: 130 [2020-10-29 09:27:55,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 09:27:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-29 09:27:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2020-10-29 09:27:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:27:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-29 09:27:55,129 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 73 [2020-10-29 09:27:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:55,129 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-29 09:27:55,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:27:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-29 09:27:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 09:27:55,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:55,130 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:55,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:27:55,131 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:55,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1228162259, now seen corresponding path program 33 times [2020-10-29 09:27:55,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:55,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398693429] [2020-10-29 09:27:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:55,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:57,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:57,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 09:27:57,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2372 [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:27:57,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:58,351 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 09:27:58,479 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-29 09:27:58,690 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-29 09:27:59,139 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-29 09:27:59,309 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-29 09:27:59,805 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-29 09:28:00,061 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-29 09:28:00,650 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2020-10-29 09:28:01,003 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 09:28:01,371 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-29 09:28:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:28:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:02,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:02,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:02,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:28:02,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:28:02,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:02,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:28:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:28:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:28:02,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:28:03,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398693429] [2020-10-29 09:28:03,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:28:03,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:28:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485654729] [2020-10-29 09:28:03,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:28:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:28:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:28:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:28:03,048 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 31 states. [2020-10-29 09:28:03,837 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-29 09:28:04,163 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-29 09:28:04,504 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-29 09:28:04,900 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-29 09:28:05,596 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 109 [2020-10-29 09:28:06,140 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-29 09:28:07,278 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 142 [2020-10-29 09:28:07,997 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-29 09:28:09,841 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 218 DAG size of output: 176 [2020-10-29 09:28:10,698 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2020-10-29 09:28:12,961 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 225 DAG size of output: 205 [2020-10-29 09:28:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:28:15,588 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2020-10-29 09:28:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:28:15,590 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2020-10-29 09:28:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:28:15,591 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:28:15,591 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:28:15,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=167, Invalid=2589, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:28:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:28:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-29 09:28:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:28:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-29 09:28:15,609 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-29 09:28:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:28:15,609 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-29 09:28:15,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:28:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-29 09:28:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:28:15,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:28:15,610 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:28:15,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:28:15,611 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:28:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:28:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash 243990913, now seen corresponding path program 34 times [2020-10-29 09:28:15,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:28:15,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856773667] [2020-10-29 09:28:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:28:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:28:15,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2812 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:28:18,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:28:19,304 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-29 09:28:19,493 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 09:28:19,799 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-29 09:28:20,168 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 09:28:20,689 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-29 09:28:21,104 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-29 09:28:21,765 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2020-10-29 09:28:22,146 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-10-29 09:28:22,959 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104