/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/list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:24:23,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:24:23,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:24:24,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:24:24,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:24:24,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:24:24,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:24:24,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:24:24,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:24:24,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:24:24,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:24:24,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:24:24,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:24:24,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:24:24,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:24:24,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:24:24,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:24:24,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:24:24,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:24:24,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:24:24,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:24:24,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:24:24,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:24:24,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:24:24,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:24:24,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:24:24,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:24:24,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:24:24,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:24:24,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:24:24,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:24:24,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:24:24,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:24:24,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:24:24,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:24:24,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:24:24,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:24:24,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:24:24,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:24:24,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:24:24,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:24:24,106 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 09:24:24,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:24:24,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:24:24,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:24:24,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:24:24,164 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:24:24,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:24:24,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:24:24,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:24:24,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:24:24,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:24:24,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:24:24,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:24:24,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:24:24,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:24:24,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:24:24,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:24:24,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:24:24,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:24:24,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:24:24,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:24:24,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:24:24,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:24,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:24:24,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:24:24,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:24:24,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:24:24,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:24:24,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:24:24,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:24:24,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:24:24,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:24:24,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:24:24,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:24:24,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:24:24,650 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:24:24,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-1.i [2020-10-29 09:24:24,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bef5e13a/512e01a1fcf546fe93ae540ef9427249/FLAGa6b0d9a60 [2020-10-29 09:24:25,315 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:24:25,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-1.i [2020-10-29 09:24:25,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bef5e13a/512e01a1fcf546fe93ae540ef9427249/FLAGa6b0d9a60 [2020-10-29 09:24:25,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bef5e13a/512e01a1fcf546fe93ae540ef9427249 [2020-10-29 09:24:25,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:24:25,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:24:25,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:25,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:24:25,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:24:25,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:25" (1/1) ... [2020-10-29 09:24:25,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749c11d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:25, skipping insertion in model container [2020-10-29 09:24:25,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:25" (1/1) ... [2020-10-29 09:24:25,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:24:25,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:24:25,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:26,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:24:26,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:26,170 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:24:26,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26 WrapperNode [2020-10-29 09:24:26,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:26,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:24:26,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:24:26,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:24:26,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (1/1) ... [2020-10-29 09:24:26,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:24:26,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:24:26,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:24:26,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:24:26,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (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 09:24:26,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:24:26,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:24:26,395 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:24:26,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:24:26,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:24:26,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-29 09:24:26,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-29 09:24:26,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-29 09:24:26,397 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:24:26,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:24:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:24:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:24:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:24:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:24:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:24:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:24:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:24:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:24:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:24:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:24:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:24:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:24:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:24:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:24:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:24:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:24:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:24:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:24:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:24:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:24:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:24:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:24:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:24:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:24:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:24:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:24:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:24:26,406 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:24:26,406 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:24:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:24:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:24:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:24:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:24:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:24:26,407 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:24:26,408 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:24:26,408 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:24:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:24:26,409 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:24:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:24:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:24:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:24:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:24:26,410 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:24:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:24:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:24:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:24:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:24:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:24:26,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:24:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:24:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:24:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:24:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:24:26,412 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:24:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:24:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:24:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:24:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:24:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:24:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:24:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:24:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:24:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:24:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:24:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:24:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:24:26,420 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:24:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:24:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:24:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:24:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:24:26,421 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:24:26,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:24:26,423 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:24:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:24:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:24:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:24:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:24:26,424 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:24:26,425 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:24:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:24:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:24:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:24:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:24:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:24:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:24:26,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:24:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:24:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:24:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:24:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:24:26,758 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:24:26,971 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:24:26,971 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 09:24:26,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:26 BoogieIcfgContainer [2020-10-29 09:24:26,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:24:26,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:24:26,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:24:26,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:24:26,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:24:25" (1/3) ... [2020-10-29 09:24:26,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c883da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:26, skipping insertion in model container [2020-10-29 09:24:26,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:26" (2/3) ... [2020-10-29 09:24:26,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c883da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:26, skipping insertion in model container [2020-10-29 09:24:26,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:26" (3/3) ... [2020-10-29 09:24:26,983 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-10-29 09:24:26,996 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:24:27,002 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:24:27,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:24:27,046 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:24:27,046 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:24:27,046 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:24:27,046 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:24:27,046 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:24:27,047 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:24:27,047 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:24:27,047 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:24:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-29 09:24:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:24:27,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:27,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:27,074 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-29 09:24:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:27,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37509922] [2020-10-29 09:24:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:27,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:27,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:24:27,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:24:27,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-29 09:24:27,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:27,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:24:27,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:24:27,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:27,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:27,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:27,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:27,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:27,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:24:27,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:27,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:27,894 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 09:24:27,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37509922] [2020-10-29 09:24:27,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:27,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:27,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959901552] [2020-10-29 09:24:27,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:27,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:27,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:27,924 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-29 09:24:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:28,189 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-10-29 09:24:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:28,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:24:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:28,201 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:24:28,201 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:24:28,205 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 09:24:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:24:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-29 09:24:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:24:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:24:28,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2020-10-29 09:24:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:28,252 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:24:28,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:24:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:28,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:28,254 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:28,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:24:28,254 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-29 09:24:28,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279458922] [2020-10-29 09:24:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:28,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:28,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:28,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 09:24:28,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:24:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:28,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:28,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:28,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:24:28,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:28,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:28,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:28,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:28,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279458922] [2020-10-29 09:24:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994716420] [2020-10-29 09:24:28,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:28,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:28,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:28,469 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-29 09:24:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:28,634 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-29 09:24:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:28,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-29 09:24:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:28,635 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:24:28,636 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:24:28,637 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 09:24:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:24:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-29 09:24:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:24:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-29 09:24:28,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-29 09:24:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:28,645 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-29 09:24:28,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-29 09:24:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:28,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:28,647 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:28,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:24:28,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-29 09:24:28,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:28,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185791253] [2020-10-29 09:24:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:28,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:28,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:28,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-29 09:24:28,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:24:28,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:28,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:28,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:28,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:28,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:24:28,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:28,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:28,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:24:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:28,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185791253] [2020-10-29 09:24:28,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:28,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:28,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978152274] [2020-10-29 09:24:28,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:28,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:28,917 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-29 09:24:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:29,070 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-29 09:24:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:29,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-29 09:24:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:29,071 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:24:29,072 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:24:29,072 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 09:24:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:24:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-29 09:24:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:24:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-29 09:24:29,078 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-29 09:24:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:29,079 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-29 09:24:29,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-29 09:24:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:24:29,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:29,080 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:29,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:24:29,081 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:29,081 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-29 09:24:29,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:29,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082870212] [2020-10-29 09:24:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:24:29,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-29 09:24:29,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:24:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:29,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:24:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:29,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:29,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:29,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,589 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 09:24:29,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082870212] [2020-10-29 09:24:29,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:29,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:24:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101895223] [2020-10-29 09:24:29,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:24:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:24:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:24:29,591 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-29 09:24:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:29,886 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-29 09:24:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:29,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:24:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:29,888 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:24:29,888 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:24:29,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:24:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-29 09:24:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:24:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-29 09:24:29,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2020-10-29 09:24:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:29,897 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-29 09:24:29,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:24:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-29 09:24:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:24:29,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:29,898 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:29,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:24:29,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-29 09:24:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:29,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221907062] [2020-10-29 09:24:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:30,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:24:30,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:30,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-29 09:24:30,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:30,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:30,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:24:30,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:30,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:24:30,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:30,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:30,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:30,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:30,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:30,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:30,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:30,424 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 09:24:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221907062] [2020-10-29 09:24:30,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:30,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:24:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085002835] [2020-10-29 09:24:30,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:24:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:30,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:24:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:24:30,427 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 9 states. [2020-10-29 09:24:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:30,780 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-29 09:24:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:30,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:24:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:30,782 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:24:30,782 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:24:30,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:24:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-29 09:24:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:24:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-29 09:24:30,792 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2020-10-29 09:24:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:30,792 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-29 09:24:30,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:24:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-29 09:24:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:24:30,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:30,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:30,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:24:30,794 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -226803475, now seen corresponding path program 1 times [2020-10-29 09:24:30,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:30,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161748710] [2020-10-29 09:24:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:30,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:24:30,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:30,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-29 09:24:30,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:30,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:30,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:30,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:30,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:30,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:31,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:31,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:31,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,128 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 09:24:31,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161748710] [2020-10-29 09:24:31,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:31,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:31,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377511236] [2020-10-29 09:24:31,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:31,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:31,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:31,131 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2020-10-29 09:24:31,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:31,458 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-29 09:24:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:31,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 09:24:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:31,460 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:24:31,460 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:24:31,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:24:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-29 09:24:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:24:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-29 09:24:31,469 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 28 [2020-10-29 09:24:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:31,469 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-29 09:24:31,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-29 09:24:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:31,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:31,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:24:31,471 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash 600500328, now seen corresponding path program 2 times [2020-10-29 09:24:31,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:31,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111108535] [2020-10-29 09:24:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:31,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-29 09:24:31,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:31,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:31,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:24:31,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:31,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:31,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:31,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111108535] [2020-10-29 09:24:31,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:31,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:31,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588219382] [2020-10-29 09:24:31,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:31,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:31,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:31,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:31,844 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 10 states. [2020-10-29 09:24:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:32,237 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-29 09:24:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:32,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:24:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:32,239 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:24:32,239 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:24:32,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:24:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-29 09:24:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:24:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-29 09:24:32,246 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-29 09:24:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:32,247 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-29 09:24:32,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-29 09:24:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:32,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:32,248 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:32,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:24:32,248 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 1 times [2020-10-29 09:24:32,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:32,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321806306] [2020-10-29 09:24:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:32,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:32,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:32,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-29 09:24:32,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:32,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:32,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:24:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:32,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:24:32,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:32,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:32,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:32,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:32,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:32,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:32,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:32,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:32,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321806306] [2020-10-29 09:24:32,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:32,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:24:32,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455048026] [2020-10-29 09:24:32,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:24:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:24:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:24:32,666 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-10-29 09:24:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:32,878 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-29 09:24:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:32,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-29 09:24:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:32,879 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:24:32,879 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:24:32,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:24:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-29 09:24:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:24:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-29 09:24:32,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 30 [2020-10-29 09:24:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:32,889 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-29 09:24:32,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:24:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-29 09:24:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:32,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:32,890 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, 1, 1, 1, 1] [2020-10-29 09:24:32,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:24:32,891 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-29 09:24:32,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:32,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266052634] [2020-10-29 09:24:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:33,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-29 09:24:33,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:33,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:33,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:33,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:33,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:33,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:33,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:33,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:33,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:33,303 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 09:24:33,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266052634] [2020-10-29 09:24:33,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:33,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:33,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535731593] [2020-10-29 09:24:33,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:33,306 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 11 states. [2020-10-29 09:24:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:33,568 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-29 09:24:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:33,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:24:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:33,569 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:24:33,570 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:24:33,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:24:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-29 09:24:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:24:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-29 09:24:33,577 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 30 [2020-10-29 09:24:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:33,578 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-29 09:24:33,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-29 09:24:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:33,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:33,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:33,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:24:33,579 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash 846283560, now seen corresponding path program 1 times [2020-10-29 09:24:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:33,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385613491] [2020-10-29 09:24:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:33,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:33,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-29 09:24:33,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:33,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:33,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:24:33,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:33,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:33,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:33,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:33,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:33,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:33,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385613491] [2020-10-29 09:24:33,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:33,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:33,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197189901] [2020-10-29 09:24:33,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:33,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:33,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:33,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:33,919 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 10 states. [2020-10-29 09:24:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:34,207 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-29 09:24:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:34,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:24:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:34,209 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:24:34,209 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:24:34,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:24:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2020-10-29 09:24:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:24:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-29 09:24:34,215 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 30 [2020-10-29 09:24:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:34,216 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-29 09:24:34,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-29 09:24:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:34,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:34,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:34,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:24:34,217 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-29 09:24:34,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:34,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396596172] [2020-10-29 09:24:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:34,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:34,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:34,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:34,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-29 09:24:34,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:34,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:34,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:34,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:34,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:34,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:34,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:34,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:34,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:34,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:34,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:34,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:34,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:34,620 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 09:24:34,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396596172] [2020-10-29 09:24:34,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:34,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:34,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584826843] [2020-10-29 09:24:34,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:34,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:34,622 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 11 states. [2020-10-29 09:24:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:34,878 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-29 09:24:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:24:34,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:24:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:34,879 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:24:34,880 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:24:34,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:24:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:24:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:24:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-29 09:24:34,895 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-29 09:24:34,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:34,896 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-29 09:24:34,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-29 09:24:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:24:34,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:34,898 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:34,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:24:34,898 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2121869460, now seen corresponding path program 3 times [2020-10-29 09:24:34,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:34,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870516930] [2020-10-29 09:24:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:35,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:35,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:24:35,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-29 09:24:35,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:35,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:35,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:35,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:35,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:35,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:35,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:35,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:35,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:35,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 09:24:35,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:35,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:35,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:35,456 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 09:24:35,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870516930] [2020-10-29 09:24:35,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:35,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330870503] [2020-10-29 09:24:35,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:35,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:35,459 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-10-29 09:24:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:36,441 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-29 09:24:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:36,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:24:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:36,444 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:24:36,444 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:24:36,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:24:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-29 09:24:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:24:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-29 09:24:36,455 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 32 [2020-10-29 09:24:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:36,455 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-29 09:24:36,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-29 09:24:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:24:36,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:36,456 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:36,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:24:36,457 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -212389868, now seen corresponding path program 2 times [2020-10-29 09:24:36,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:36,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288941737] [2020-10-29 09:24:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:36,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:36,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:36,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:24:36,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-29 09:24:36,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:36,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:36,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:36,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:36,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:36,994 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 09:24:36,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288941737] [2020-10-29 09:24:36,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:36,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:36,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891677046] [2020-10-29 09:24:36,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:36,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:36,998 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 12 states. [2020-10-29 09:24:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:37,558 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-10-29 09:24:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:37,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:24:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:37,560 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:24:37,561 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:24:37,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:24:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-29 09:24:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:24:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-29 09:24:37,569 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 32 [2020-10-29 09:24:37,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:37,570 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-29 09:24:37,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-29 09:24:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:24:37,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:37,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:37,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:24:37,571 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:37,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1477606833, now seen corresponding path program 4 times [2020-10-29 09:24:37,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:37,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185987797] [2020-10-29 09:24:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:37,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:37,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:37,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:24:37,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:37,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-29 09:24:37,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:37,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:37,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:37,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:37,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:24:37,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:38,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:38,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:38,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:38,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:38,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:38,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:38,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:38,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:38,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:38,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:38,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185987797] [2020-10-29 09:24:38,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:38,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:38,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892366641] [2020-10-29 09:24:38,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:38,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:38,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:38,335 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 13 states. [2020-10-29 09:24:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:38,980 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-29 09:24:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:38,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 09:24:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:38,982 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:24:38,982 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:24:38,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:24:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-10-29 09:24:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:24:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-29 09:24:38,999 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 34 [2020-10-29 09:24:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:38,999 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-29 09:24:38,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-29 09:24:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:24:39,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:39,004 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:39,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:24:39,005 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:39,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1169316170, now seen corresponding path program 5 times [2020-10-29 09:24:39,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:39,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450909245] [2020-10-29 09:24:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:39,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:39,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:39,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:24:39,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:39,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-29 09:24:39,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:39,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:24:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:39,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:39,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:39,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:39,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:39,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:39,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:39,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:39,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:39,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:39,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:39,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:39,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450909245] [2020-10-29 09:24:39,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:39,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:39,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883699384] [2020-10-29 09:24:39,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:39,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:39,779 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 13 states. [2020-10-29 09:24:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:40,367 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-10-29 09:24:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:40,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-29 09:24:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:40,368 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:24:40,369 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:24:40,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:24:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-29 09:24:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:24:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-29 09:24:40,376 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 36 [2020-10-29 09:24:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:40,376 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-29 09:24:40,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-29 09:24:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:24:40,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:40,377 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:40,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:24:40,378 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:40,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1866893130, now seen corresponding path program 2 times [2020-10-29 09:24:40,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:40,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453741970] [2020-10-29 09:24:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:40,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:40,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:41,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:41,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:41,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:41,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:24:41,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:24:41,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-29 09:24:41,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:41,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:24:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:24:41,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:41,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:41,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:41,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:41,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:41,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:41,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:41,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:41,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:24:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453741970] [2020-10-29 09:24:41,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:41,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:24:41,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343948717] [2020-10-29 09:24:41,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:24:41,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:24:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:24:41,942 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 11 states. [2020-10-29 09:24:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:42,197 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-10-29 09:24:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:42,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-29 09:24:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:42,200 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:24:42,200 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:24:42,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:24:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-29 09:24:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:24:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-29 09:24:42,209 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 36 [2020-10-29 09:24:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:42,209 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-29 09:24:42,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:24:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-29 09:24:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:24:42,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:42,210 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, 1, 1, 1, 1, 1] [2020-10-29 09:24:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:24:42,211 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2074286917, now seen corresponding path program 6 times [2020-10-29 09:24:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:42,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200533514] [2020-10-29 09:24:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:42,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:42,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:24:42,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:42,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-29 09:24:42,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:42,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:42,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:24:42,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:42,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:24:42,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:43,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:43,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:43,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:43,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:43,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:43,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:43,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:43,171 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 09:24:43,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200533514] [2020-10-29 09:24:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:24:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254444207] [2020-10-29 09:24:43,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:24:43,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:24:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:43,177 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 14 states. [2020-10-29 09:24:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:44,036 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-29 09:24:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:44,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 09:24:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:44,038 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:24:44,038 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 09:24:44,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:24:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 09:24:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2020-10-29 09:24:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:24:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-29 09:24:44,057 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 36 [2020-10-29 09:24:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:44,057 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-29 09:24:44,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:24:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-29 09:24:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:24:44,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:44,058 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:44,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:24:44,059 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:44,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1761664522, now seen corresponding path program 1 times [2020-10-29 09:24:44,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:44,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973190493] [2020-10-29 09:24:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:44,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:44,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:24:44,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:44,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-29 09:24:44,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:44,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:44,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:24:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:24:44,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:45,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:45,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:45,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:45,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:45,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973190493] [2020-10-29 09:24:45,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:45,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:45,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281118986] [2020-10-29 09:24:45,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:45,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:45,029 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 12 states. [2020-10-29 09:24:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:45,552 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2020-10-29 09:24:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:45,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-29 09:24:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:45,554 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:24:45,554 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:24:45,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:24:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-29 09:24:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:24:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-29 09:24:45,563 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 36 [2020-10-29 09:24:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:45,564 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-29 09:24:45,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-29 09:24:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:24:45,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:45,565 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:45,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:24:45,565 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2064345910, now seen corresponding path program 3 times [2020-10-29 09:24:45,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:45,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621609211] [2020-10-29 09:24:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:45,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:45,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:45,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:24:45,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:45,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-29 09:24:45,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:45,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:45,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:46,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:46,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:46,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621609211] [2020-10-29 09:24:46,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:46,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:46,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051390139] [2020-10-29 09:24:46,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:46,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:46,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:46,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:46,286 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 13 states. [2020-10-29 09:24:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:46,831 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-29 09:24:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:46,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-29 09:24:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:46,833 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:24:46,833 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:24:46,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:24:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:24:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-10-29 09:24:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 09:24:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-29 09:24:46,850 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 36 [2020-10-29 09:24:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:46,850 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-29 09:24:46,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-29 09:24:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:24:46,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:46,853 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:46,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:24:46,853 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:46,854 INFO L82 PathProgramCache]: Analyzing trace with hash -518509509, now seen corresponding path program 2 times [2020-10-29 09:24:46,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:46,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113635973] [2020-10-29 09:24:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:24:47,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-29 09:24:47,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:24:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:24:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:47,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:47,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:47,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:47,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:47,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:47,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113635973] [2020-10-29 09:24:47,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:47,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:24:47,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910335648] [2020-10-29 09:24:47,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:24:47,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:24:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:47,604 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 14 states. [2020-10-29 09:24:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:48,388 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-29 09:24:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:48,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 09:24:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:48,390 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:24:48,390 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:24:48,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:24:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-10-29 09:24:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:24:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-10-29 09:24:48,399 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 36 [2020-10-29 09:24:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:48,399 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-10-29 09:24:48,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:24:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-10-29 09:24:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:24:48,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:48,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:48,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:24:48,400 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1009594186, now seen corresponding path program 7 times [2020-10-29 09:24:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:48,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717750038] [2020-10-29 09:24:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:48,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:48,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:24:48,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-29 09:24:48,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:48,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:24:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:24:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:49,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:49,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:49,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:49,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:49,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:49,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:49,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:49,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:49,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:49,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:49,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717750038] [2020-10-29 09:24:49,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:49,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:24:49,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505146455] [2020-10-29 09:24:49,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:24:49,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:49,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:24:49,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:49,244 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 15 states. [2020-10-29 09:24:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:50,230 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2020-10-29 09:24:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:24:50,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:24:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:50,231 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:24:50,232 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:24:50,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:24:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:24:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2020-10-29 09:24:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:24:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2020-10-29 09:24:50,242 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 38 [2020-10-29 09:24:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:50,242 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2020-10-29 09:24:50,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:24:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2020-10-29 09:24:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:24:50,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:50,243 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:50,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:24:50,243 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash 886692086, now seen corresponding path program 4 times [2020-10-29 09:24:50,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:50,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521831753] [2020-10-29 09:24:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:50,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:50,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:24:50,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:50,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-29 09:24:50,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:50,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:24:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:50,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:24:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:51,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:51,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:51,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:51,284 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: 2 [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 09:24:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:51,285 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 09:24:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521831753] [2020-10-29 09:24:51,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:51,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:24:51,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542262593] [2020-10-29 09:24:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:24:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:24:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:51,313 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand 15 states. [2020-10-29 09:24:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:52,277 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2020-10-29 09:24:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:24:52,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:24:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:52,282 INFO L225 Difference]: With dead ends: 133 [2020-10-29 09:24:52,282 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:24:52,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:24:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:24:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-10-29 09:24:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:24:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2020-10-29 09:24:52,302 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 38 [2020-10-29 09:24:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:52,302 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2020-10-29 09:24:52,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:24:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2020-10-29 09:24:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:24:52,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:52,303 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:52,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:24:52,303 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash -42096143, now seen corresponding path program 8 times [2020-10-29 09:24:52,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:52,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266640477] [2020-10-29 09:24:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:52,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:52,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:52,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:24:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:53,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:53,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:53,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:53,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:53,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:53,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:53,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:53,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:53,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266640477] [2020-10-29 09:24:53,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:53,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:24:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475120106] [2020-10-29 09:24:53,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:24:53,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:24:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:53,426 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 16 states. [2020-10-29 09:24:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:54,382 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-29 09:24:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:54,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-29 09:24:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:54,385 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:24:54,385 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:24:54,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:24:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:24:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2020-10-29 09:24:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:24:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2020-10-29 09:24:54,397 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 40 [2020-10-29 09:24:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:54,397 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2020-10-29 09:24:54,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:24:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2020-10-29 09:24:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:24:54,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:54,398 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, 1, 1, 1, 1, 1] [2020-10-29 09:24:54,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:24:54,398 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1009268066, now seen corresponding path program 9 times [2020-10-29 09:24:54,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:54,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923227583] [2020-10-29 09:24:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:54,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:54,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:24:54,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-29 09:24:54,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:54,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:24:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:54,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:24:54,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:55,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:55,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:55,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:55,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:55,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:24:55,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:55,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923227583] [2020-10-29 09:24:55,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:55,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:24:55,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773063199] [2020-10-29 09:24:55,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:24:55,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:24:55,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:55,352 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand 15 states. [2020-10-29 09:24:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:55,844 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2020-10-29 09:24:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:55,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:24:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:55,846 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:24:55,847 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:24:55,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:24:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:24:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-10-29 09:24:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:24:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2020-10-29 09:24:55,858 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 40 [2020-10-29 09:24:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:55,859 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2020-10-29 09:24:55,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:24:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2020-10-29 09:24:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:24:55,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:55,860 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:55,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:24:55,860 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2010587244, now seen corresponding path program 10 times [2020-10-29 09:24:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:55,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126117048] [2020-10-29 09:24:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:55,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:24:56,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:56,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-29 09:24:56,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:24:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:56,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:24:56,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:57,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:57,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:57,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:57,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:57,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126117048] [2020-10-29 09:24:57,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:57,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:24:57,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934259367] [2020-10-29 09:24:57,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:24:57,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:24:57,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:57,040 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand 16 states. [2020-10-29 09:24:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:58,230 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2020-10-29 09:24:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:58,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-29 09:24:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:58,232 INFO L225 Difference]: With dead ends: 145 [2020-10-29 09:24:58,233 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:24:58,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:24:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:24:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2020-10-29 09:24:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:24:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2020-10-29 09:24:58,242 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 42 [2020-10-29 09:24:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:58,242 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2020-10-29 09:24:58,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:24:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2020-10-29 09:24:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:24:58,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:58,243 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:58,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:24:58,244 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1240689763, now seen corresponding path program 11 times [2020-10-29 09:24:58,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:58,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827756405] [2020-10-29 09:24:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:58,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:24:58,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-29 09:24:58,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:58,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:24:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:24:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,343 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-29 09:24:59,478 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-29 09:24:59,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:59,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:59,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:59,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:59,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:59,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827756405] [2020-10-29 09:24:59,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:59,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:24:59,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046186633] [2020-10-29 09:24:59,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:24:59,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:59,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:24:59,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:24:59,857 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 17 states. [2020-10-29 09:25:00,562 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-29 09:25:00,860 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-29 09:25:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:01,370 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2020-10-29 09:25:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:25:01,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-29 09:25:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:01,373 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:25:01,373 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:25:01,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:25:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:25:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2020-10-29 09:25:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:25:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2020-10-29 09:25:01,385 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 42 [2020-10-29 09:25:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:01,385 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2020-10-29 09:25:01,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:25:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2020-10-29 09:25:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:25:01,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:01,386 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:01,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:25:01,386 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 519261996, now seen corresponding path program 3 times [2020-10-29 09:25:01,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908414801] [2020-10-29 09:25:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:01,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:02,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:02,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:25:02,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:03,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:03,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:03,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:03,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:03,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:03,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:03,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:03,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:03,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:03,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:03,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:25:03,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908414801] [2020-10-29 09:25:03,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:03,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:25:03,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838710543] [2020-10-29 09:25:03,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:25:03,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:03,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:25:03,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:25:03,411 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand 14 states. [2020-10-29 09:25:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:04,260 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2020-10-29 09:25:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:25:04,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-29 09:25:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:04,262 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:25:04,263 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:25:04,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:25:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:25:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-10-29 09:25:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:25:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2020-10-29 09:25:04,274 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 42 [2020-10-29 09:25:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:04,275 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2020-10-29 09:25:04,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:25:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2020-10-29 09:25:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:25:04,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:04,275 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:04,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:25:04,276 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1821182484, now seen corresponding path program 4 times [2020-10-29 09:25:04,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:04,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17083157] [2020-10-29 09:25:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:04,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:04,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:05,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:05,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:25:05,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:05,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-29 09:25:05,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:05,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:25:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:05,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:25:05,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:05,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:05,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:05,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:05,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:05,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:05,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:05,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:05,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:05,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:25:05,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17083157] [2020-10-29 09:25:05,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:05,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:25:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797258208] [2020-10-29 09:25:05,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:25:05,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:25:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:25:05,911 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 15 states. [2020-10-29 09:25:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:07,049 INFO L93 Difference]: Finished difference Result 152 states and 169 transitions. [2020-10-29 09:25:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:25:07,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-29 09:25:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:07,052 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:25:07,052 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:25:07,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:25:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:25:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-10-29 09:25:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:25:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2020-10-29 09:25:07,063 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 42 [2020-10-29 09:25:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:07,063 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2020-10-29 09:25:07,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:25:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2020-10-29 09:25:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:25:07,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:07,064 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:07,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:25:07,065 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2125202260, now seen corresponding path program 5 times [2020-10-29 09:25:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003830351] [2020-10-29 09:25:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:07,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:07,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:07,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:25:07,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-29 09:25:07,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:07,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:07,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:25:07,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:07,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:25:07,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:08,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:08,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:08,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:08,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003830351] [2020-10-29 09:25:08,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:08,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:25:08,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464191451] [2020-10-29 09:25:08,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:25:08,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:25:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:25:08,162 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand 16 states. [2020-10-29 09:25:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:09,290 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2020-10-29 09:25:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:25:09,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-29 09:25:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:09,292 INFO L225 Difference]: With dead ends: 149 [2020-10-29 09:25:09,292 INFO L226 Difference]: Without dead ends: 130 [2020-10-29 09:25:09,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:25:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-29 09:25:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2020-10-29 09:25:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:25:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2020-10-29 09:25:09,303 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 42 [2020-10-29 09:25:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:09,303 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2020-10-29 09:25:09,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:25:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2020-10-29 09:25:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:25:09,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:09,304 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:09,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:25:09,305 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:09,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1659861981, now seen corresponding path program 5 times [2020-10-29 09:25:09,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:09,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228045953] [2020-10-29 09:25:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:09,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:09,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:09,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:25:09,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:25:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:10,321 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-29 09:25:10,578 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-29 09:25:10,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:10,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:10,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:10,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228045953] [2020-10-29 09:25:10,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:10,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:25:10,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6509188] [2020-10-29 09:25:10,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:25:10,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:10,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:25:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:25:10,921 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand 17 states. [2020-10-29 09:25:11,803 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 09:25:11,989 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-29 09:25:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:12,417 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2020-10-29 09:25:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:25:12,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-29 09:25:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:12,420 INFO L225 Difference]: With dead ends: 145 [2020-10-29 09:25:12,420 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:25:12,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:25:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:25:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2020-10-29 09:25:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 09:25:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2020-10-29 09:25:12,430 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 42 [2020-10-29 09:25:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:12,430 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2020-10-29 09:25:12,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:25:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2020-10-29 09:25:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:25:12,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:12,432 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:12,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:25:12,432 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1213353752, now seen corresponding path program 12 times [2020-10-29 09:25:12,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:12,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604101095] [2020-10-29 09:25:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:12,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:13,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:13,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:25:13,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-29 09:25:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:13,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:25:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:25:13,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:14,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:14,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:14,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:14,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:14,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:14,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:14,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:14,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:14,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604101095] [2020-10-29 09:25:14,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:14,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:25:14,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636483441] [2020-10-29 09:25:14,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:25:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:25:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:25:14,119 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand 18 states. [2020-10-29 09:25:15,123 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-29 09:25:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:15,824 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2020-10-29 09:25:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:25:15,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-29 09:25:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:15,827 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:25:15,827 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:25:15,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:25:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2020-10-29 09:25:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-29 09:25:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-10-29 09:25:15,839 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 44 [2020-10-29 09:25:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:15,840 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-10-29 09:25:15,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:25:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-10-29 09:25:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:25:15,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:15,841 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:15,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:25:15,842 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:15,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1424156648, now seen corresponding path program 6 times [2020-10-29 09:25:15,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:15,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290213973] [2020-10-29 09:25:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:16,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:16,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:25:16,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:25:16,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:17,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:17,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:17,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:17,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:17,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:17,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:17,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:17,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:17,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290213973] [2020-10-29 09:25:17,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:25:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571761770] [2020-10-29 09:25:17,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:25:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:17,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:25:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:25:17,316 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 18 states. [2020-10-29 09:25:18,543 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-29 09:25:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:19,248 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2020-10-29 09:25:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:25:19,249 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-29 09:25:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:19,251 INFO L225 Difference]: With dead ends: 177 [2020-10-29 09:25:19,251 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 09:25:19,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:25:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 09:25:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 153. [2020-10-29 09:25:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-29 09:25:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 172 transitions. [2020-10-29 09:25:19,265 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 172 transitions. Word has length 44 [2020-10-29 09:25:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:19,265 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 172 transitions. [2020-10-29 09:25:19,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:25:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 172 transitions. [2020-10-29 09:25:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:25:19,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:19,266 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:19,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:25:19,266 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1612126163, now seen corresponding path program 13 times [2020-10-29 09:25:19,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:19,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193496933] [2020-10-29 09:25:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:19,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:20,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:20,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:25:20,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:20,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-29 09:25:20,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:20,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:20,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:25:20,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:20,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:20,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:20,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:20,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:20,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:20,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:20,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:20,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:20,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:21,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193496933] [2020-10-29 09:25:21,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:21,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:25:21,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037782794] [2020-10-29 09:25:21,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:25:21,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:25:21,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:25:21,018 INFO L87 Difference]: Start difference. First operand 153 states and 172 transitions. Second operand 19 states. [2020-10-29 09:25:22,070 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-29 09:25:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:23,032 INFO L93 Difference]: Finished difference Result 189 states and 210 transitions. [2020-10-29 09:25:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:25:23,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-29 09:25:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:23,034 INFO L225 Difference]: With dead ends: 189 [2020-10-29 09:25:23,034 INFO L226 Difference]: Without dead ends: 183 [2020-10-29 09:25:23,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-29 09:25:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 163. [2020-10-29 09:25:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-29 09:25:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2020-10-29 09:25:23,050 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 46 [2020-10-29 09:25:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:23,050 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2020-10-29 09:25:23,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:25:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2020-10-29 09:25:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:25:23,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:23,052 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:23,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:25:23,052 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1639150844, now seen corresponding path program 14 times [2020-10-29 09:25:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:23,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044096036] [2020-10-29 09:25:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:23,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:23,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:23,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:25:23,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:24,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:24,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:24,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:24,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:24,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:24,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:24,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:24,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:24,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:24,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:24,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:25:24,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044096036] [2020-10-29 09:25:24,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:24,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:25:24,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928591233] [2020-10-29 09:25:24,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:25:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:25:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:25:24,530 INFO L87 Difference]: Start difference. First operand 163 states and 183 transitions. Second operand 18 states. [2020-10-29 09:25:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:25,838 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2020-10-29 09:25:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:25:25,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-29 09:25:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:25,845 INFO L225 Difference]: With dead ends: 185 [2020-10-29 09:25:25,845 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:25:25,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:25:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2020-10-29 09:25:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-29 09:25:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2020-10-29 09:25:25,859 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 46 [2020-10-29 09:25:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:25,860 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2020-10-29 09:25:25,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:25:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2020-10-29 09:25:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:25,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:25,861 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:25,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:25:25,861 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1714643506, now seen corresponding path program 15 times [2020-10-29 09:25:25,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:25,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477260137] [2020-10-29 09:25:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:25,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:26,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:26,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:26,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:26,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-29 09:25:26,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:26,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:25:26,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:27,067 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-29 09:25:27,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:27,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:27,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:27,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477260137] [2020-10-29 09:25:27,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:27,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:25:27,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905068332] [2020-10-29 09:25:27,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:25:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:25:27,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:25:27,796 INFO L87 Difference]: Start difference. First operand 163 states and 183 transitions. Second operand 19 states. [2020-10-29 09:25:28,858 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-29 09:25:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:29,775 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2020-10-29 09:25:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:25:29,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-29 09:25:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:29,777 INFO L225 Difference]: With dead ends: 197 [2020-10-29 09:25:29,777 INFO L226 Difference]: Without dead ends: 176 [2020-10-29 09:25:29,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-29 09:25:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 137. [2020-10-29 09:25:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:25:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2020-10-29 09:25:29,791 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 48 [2020-10-29 09:25:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:29,791 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2020-10-29 09:25:29,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:25:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2020-10-29 09:25:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:29,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:29,792 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:29,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:25:29,792 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 544344255, now seen corresponding path program 16 times [2020-10-29 09:25:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:29,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361947033] [2020-10-29 09:25:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:29,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:30,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:30,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:25:30,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:31,117 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-29 09:25:31,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:31,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:31,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:31,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:31,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361947033] [2020-10-29 09:25:31,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:31,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:25:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257747499] [2020-10-29 09:25:31,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:25:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:25:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:25:31,587 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand 20 states. [2020-10-29 09:25:32,375 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-29 09:25:32,798 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-29 09:25:33,030 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-29 09:25:33,233 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-29 09:25:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:33,985 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2020-10-29 09:25:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:25:33,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-29 09:25:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:33,987 INFO L225 Difference]: With dead ends: 212 [2020-10-29 09:25:33,987 INFO L226 Difference]: Without dead ends: 206 [2020-10-29 09:25:33,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:25:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-29 09:25:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 171. [2020-10-29 09:25:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-29 09:25:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2020-10-29 09:25:34,005 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 48 [2020-10-29 09:25:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:34,005 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2020-10-29 09:25:34,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:25:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2020-10-29 09:25:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:34,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:34,006 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:34,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:25:34,006 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:34,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2054944398, now seen corresponding path program 6 times [2020-10-29 09:25:34,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:34,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774866764] [2020-10-29 09:25:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:34,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:34,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:36,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2740 [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:25:36,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:36,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:25:36,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:37,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:37,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:37,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:37,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:37,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:25:37,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774866764] [2020-10-29 09:25:37,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:37,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:25:37,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202974395] [2020-10-29 09:25:37,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:25:37,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:25:37,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:25:37,551 INFO L87 Difference]: Start difference. First operand 171 states and 193 transitions. Second operand 16 states. [2020-10-29 09:25:38,335 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-29 09:25:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:38,653 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2020-10-29 09:25:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:25:38,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-29 09:25:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:38,655 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:25:38,656 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:25:38,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:25:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:25:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2020-10-29 09:25:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-29 09:25:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 192 transitions. [2020-10-29 09:25:38,671 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 192 transitions. Word has length 48 [2020-10-29 09:25:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:38,672 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 192 transitions. [2020-10-29 09:25:38,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:25:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 192 transitions. [2020-10-29 09:25:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:38,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:38,673 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:38,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:25:38,673 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1255378254, now seen corresponding path program 7 times [2020-10-29 09:25:38,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:38,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362330811] [2020-10-29 09:25:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:38,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:25:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:25:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:41,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:41,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:41,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:41,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:41,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:25:41,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362330811] [2020-10-29 09:25:41,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:41,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:25:41,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052761215] [2020-10-29 09:25:41,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:25:41,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:41,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:25:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:25:41,802 INFO L87 Difference]: Start difference. First operand 171 states and 192 transitions. Second operand 17 states. [2020-10-29 09:25:42,408 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-29 09:25:42,705 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-29 09:25:42,909 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-29 09:25:43,101 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-29 09:25:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:43,623 INFO L93 Difference]: Finished difference Result 200 states and 222 transitions. [2020-10-29 09:25:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:25:43,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-29 09:25:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:43,628 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:25:43,628 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:25:43,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:25:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2020-10-29 09:25:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-29 09:25:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-10-29 09:25:43,643 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 48 [2020-10-29 09:25:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:43,644 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-10-29 09:25:43,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:25:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-10-29 09:25:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:43,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:43,645 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:43,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:25:43,645 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1643871218, now seen corresponding path program 8 times [2020-10-29 09:25:43,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:43,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672819959] [2020-10-29 09:25:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:43,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:44,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:45,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:45,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:45,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:25:45,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1387 [2020-10-29 09:25:45,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:45,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:45,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:25:45,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:45,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:25:45,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:45,548 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 09:25:45,699 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-29 09:25:46,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:46,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:46,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:46,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:25:46,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672819959] [2020-10-29 09:25:46,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:25:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317873547] [2020-10-29 09:25:46,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:25:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:25:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:25:46,029 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 18 states. [2020-10-29 09:25:46,821 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-29 09:25:47,006 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:25:47,393 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-29 09:25:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:47,971 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2020-10-29 09:25:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:25:47,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-29 09:25:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:47,973 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:25:47,973 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:25:47,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:25:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:25:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2020-10-29 09:25:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-29 09:25:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2020-10-29 09:25:47,990 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 48 [2020-10-29 09:25:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:47,990 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2020-10-29 09:25:47,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:25:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2020-10-29 09:25:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:47,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:47,991 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:47,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:25:47,991 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1749099826, now seen corresponding path program 7 times [2020-10-29 09:25:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:47,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369050192] [2020-10-29 09:25:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:48,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:48,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:48,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:48,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:48,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-29 09:25:48,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:48,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:25:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:25:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:49,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:49,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:49,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:49,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:49,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369050192] [2020-10-29 09:25:49,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:49,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:25:49,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881471505] [2020-10-29 09:25:49,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:25:49,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:25:49,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:25:49,516 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand 19 states. [2020-10-29 09:25:50,549 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-29 09:25:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:51,297 INFO L93 Difference]: Finished difference Result 197 states and 217 transitions. [2020-10-29 09:25:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:25:51,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-29 09:25:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:51,300 INFO L225 Difference]: With dead ends: 197 [2020-10-29 09:25:51,300 INFO L226 Difference]: Without dead ends: 176 [2020-10-29 09:25:51,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:25:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-29 09:25:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2020-10-29 09:25:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:25:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2020-10-29 09:25:51,314 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 48 [2020-10-29 09:25:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:51,314 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2020-10-29 09:25:51,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:25:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2020-10-29 09:25:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:25:51,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:51,315 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:51,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:25:51,316 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2139663937, now seen corresponding path program 9 times [2020-10-29 09:25:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:51,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106944263] [2020-10-29 09:25:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:51,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:25:52,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:25:52,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:52,389 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-29 09:25:52,632 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-29 09:25:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:53,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:53,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106944263] [2020-10-29 09:25:53,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:53,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:25:53,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273852605] [2020-10-29 09:25:53,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:25:53,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:53,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:25:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:25:53,183 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand 20 states. [2020-10-29 09:25:54,518 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:25:54,764 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-29 09:25:55,020 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-29 09:25:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:55,637 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2020-10-29 09:25:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:25:55,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-29 09:25:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:55,640 INFO L225 Difference]: With dead ends: 193 [2020-10-29 09:25:55,640 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 09:25:55,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:25:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 09:25:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2020-10-29 09:25:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-29 09:25:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2020-10-29 09:25:55,657 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 48 [2020-10-29 09:25:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:55,658 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2020-10-29 09:25:55,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:25:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2020-10-29 09:25:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:25:55,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:55,659 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:55,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:25:55,659 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873350, now seen corresponding path program 17 times [2020-10-29 09:25:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:55,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476828040] [2020-10-29 09:25:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:56,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:56,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:25:56,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:57,415 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-29 09:25:57,711 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-29 09:25:57,966 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-29 09:25:58,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:58,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:58,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:58,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:58,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:58,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:58,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:58,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:58,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:58,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:58,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:58,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:58,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476828040] [2020-10-29 09:25:58,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:58,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:25:58,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413374395] [2020-10-29 09:25:58,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:25:58,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:25:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:25:58,335 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 21 states. [2020-10-29 09:25:59,138 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 09:25:59,337 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-29 09:25:59,986 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-29 09:26:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:00,975 INFO L93 Difference]: Finished difference Result 226 states and 249 transitions. [2020-10-29 09:26:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:26:00,976 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-29 09:26:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:00,978 INFO L225 Difference]: With dead ends: 226 [2020-10-29 09:26:00,978 INFO L226 Difference]: Without dead ends: 220 [2020-10-29 09:26:00,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:26:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-29 09:26:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2020-10-29 09:26:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 09:26:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 211 transitions. [2020-10-29 09:26:00,993 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 211 transitions. Word has length 50 [2020-10-29 09:26:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:00,994 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 211 transitions. [2020-10-29 09:26:00,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:26:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 211 transitions. [2020-10-29 09:26:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:26:00,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:00,994 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:00,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:26:00,995 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1475628410, now seen corresponding path program 8 times [2020-10-29 09:26:00,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:00,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632730057] [2020-10-29 09:26:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:01,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:26:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:02,071 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 09:26:02,291 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-29 09:26:02,571 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-29 09:26:02,713 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-29 09:26:02,856 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-29 09:26:03,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:03,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:03,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:03,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:03,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:03,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:03,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:03,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:03,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:03,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:03,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632730057] [2020-10-29 09:26:03,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:03,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:26:03,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661159628] [2020-10-29 09:26:03,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:26:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:26:03,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:26:03,268 INFO L87 Difference]: Start difference. First operand 190 states and 211 transitions. Second operand 21 states. [2020-10-29 09:26:04,373 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-29 09:26:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:05,255 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2020-10-29 09:26:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:26:05,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-29 09:26:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:05,257 INFO L225 Difference]: With dead ends: 227 [2020-10-29 09:26:05,258 INFO L226 Difference]: Without dead ends: 219 [2020-10-29 09:26:05,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:26:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-29 09:26:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2020-10-29 09:26:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:26:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2020-10-29 09:26:05,280 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 50 [2020-10-29 09:26:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:05,281 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2020-10-29 09:26:05,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:26:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2020-10-29 09:26:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:26:05,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:05,282 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:05,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:26:05,282 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:05,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2103890955, now seen corresponding path program 18 times [2020-10-29 09:26:05,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:05,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155150005] [2020-10-29 09:26:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:06,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:26:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:26:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:07,012 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 09:26:07,289 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-29 09:26:07,453 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-29 09:26:07,613 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-29 09:26:08,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:08,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:08,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:08,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:08,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:08,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:08,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:08,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:08,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155150005] [2020-10-29 09:26:08,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:08,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:26:08,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269533848] [2020-10-29 09:26:08,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:26:08,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:26:08,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:26:08,250 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand 22 states. [2020-10-29 09:26:08,837 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-29 09:26:09,071 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-29 09:26:09,359 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 09:26:09,573 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:26:09,855 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-29 09:26:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:11,093 INFO L93 Difference]: Finished difference Result 247 states and 273 transitions. [2020-10-29 09:26:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:26:11,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-29 09:26:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:11,096 INFO L225 Difference]: With dead ends: 247 [2020-10-29 09:26:11,096 INFO L226 Difference]: Without dead ends: 241 [2020-10-29 09:26:11,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:26:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-29 09:26:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 211. [2020-10-29 09:26:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-29 09:26:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2020-10-29 09:26:11,123 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 52 [2020-10-29 09:26:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:11,123 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2020-10-29 09:26:11,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:26:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2020-10-29 09:26:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:26:11,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:11,124 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:11,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:26:11,124 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash 155096806, now seen corresponding path program 19 times [2020-10-29 09:26:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:11,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415336925] [2020-10-29 09:26:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:11,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:12,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:12,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:26:12,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:12,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-29 09:26:12,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:12,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:12,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:26:12,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:12,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:26:12,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:13,021 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-29 09:26:13,158 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 09:26:13,331 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-29 09:26:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:13,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:13,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:13,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:13,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415336925] [2020-10-29 09:26:13,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:13,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:26:13,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650029209] [2020-10-29 09:26:13,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:26:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:26:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:26:13,817 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand 22 states. [2020-10-29 09:26:14,687 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-29 09:26:15,078 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-29 09:26:15,259 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-29 09:26:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:15,807 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2020-10-29 09:26:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:26:15,808 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-29 09:26:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:15,810 INFO L225 Difference]: With dead ends: 243 [2020-10-29 09:26:15,810 INFO L226 Difference]: Without dead ends: 237 [2020-10-29 09:26:15,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:26:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-29 09:26:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 211. [2020-10-29 09:26:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-29 09:26:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2020-10-29 09:26:15,837 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 52 [2020-10-29 09:26:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:15,837 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2020-10-29 09:26:15,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:26:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2020-10-29 09:26:15,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:15,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:15,839 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:15,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:26:15,839 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash 605696368, now seen corresponding path program 20 times [2020-10-29 09:26:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:15,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166075159] [2020-10-29 09:26:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-29 09:26:17,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:17,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:26:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:17,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:26:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:17,370 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 09:26:17,559 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-29 09:26:17,850 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 09:26:18,113 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-29 09:26:18,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:18,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:18,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:18,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:18,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166075159] [2020-10-29 09:26:18,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:18,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:26:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428109660] [2020-10-29 09:26:18,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:26:18,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:26:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:26:18,717 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand 22 states. [2020-10-29 09:26:19,303 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-29 09:26:19,759 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:26:19,971 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:26:20,269 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-29 09:26:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:21,521 INFO L93 Difference]: Finished difference Result 257 states and 284 transitions. [2020-10-29 09:26:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:26:21,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-29 09:26:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:21,526 INFO L225 Difference]: With dead ends: 257 [2020-10-29 09:26:21,526 INFO L226 Difference]: Without dead ends: 234 [2020-10-29 09:26:21,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:26:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-29 09:26:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 180. [2020-10-29 09:26:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:26:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 200 transitions. [2020-10-29 09:26:21,547 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 200 transitions. Word has length 54 [2020-10-29 09:26:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:21,548 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 200 transitions. [2020-10-29 09:26:21,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:26:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 200 transitions. [2020-10-29 09:26:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:21,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:21,549 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:21,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:26:21,549 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1760517087, now seen corresponding path program 21 times [2020-10-29 09:26:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:21,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583401088] [2020-10-29 09:26:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:21,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:22,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:22,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:22,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:22,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-29 09:26:22,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:22,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:26:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:26:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:23,168 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-29 09:26:23,463 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-29 09:26:23,732 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-29 09:26:24,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:24,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:24,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:24,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:24,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:24,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:24,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:24,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:24,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:24,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:24,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:24,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:24,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583401088] [2020-10-29 09:26:24,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:24,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:26:24,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12405719] [2020-10-29 09:26:24,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:26:24,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:26:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:26:24,312 INFO L87 Difference]: Start difference. First operand 180 states and 200 transitions. Second operand 23 states. [2020-10-29 09:26:25,562 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-10-29 09:26:25,818 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-29 09:26:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:26,565 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2020-10-29 09:26:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:26:26,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-29 09:26:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:26,567 INFO L225 Difference]: With dead ends: 218 [2020-10-29 09:26:26,567 INFO L226 Difference]: Without dead ends: 212 [2020-10-29 09:26:26,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:26:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-29 09:26:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2020-10-29 09:26:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:26:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2020-10-29 09:26:26,592 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 54 [2020-10-29 09:26:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:26,592 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2020-10-29 09:26:26,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:26:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2020-10-29 09:26:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:26,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:26,593 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:26,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:26:26,594 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:26,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1832766416, now seen corresponding path program 10 times [2020-10-29 09:26:26,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276829515] [2020-10-29 09:26:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:27,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:30,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:30,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:30,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4229 [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:26:30,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:31,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:31,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:31,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:31,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:31,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:31,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:31,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:31,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:31,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:31,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:31,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:31,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-29 09:26:31,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276829515] [2020-10-29 09:26:31,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:31,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:26:31,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939684062] [2020-10-29 09:26:31,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:26:31,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:31,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:26:31,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:26:31,696 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand 18 states. [2020-10-29 09:26:32,301 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-29 09:26:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:32,594 INFO L93 Difference]: Finished difference Result 236 states and 263 transitions. [2020-10-29 09:26:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:26:32,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-29 09:26:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:32,597 INFO L225 Difference]: With dead ends: 236 [2020-10-29 09:26:32,597 INFO L226 Difference]: Without dead ends: 201 [2020-10-29 09:26:32,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:26:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-29 09:26:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-29 09:26:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:26:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 220 transitions. [2020-10-29 09:26:32,617 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 220 transitions. Word has length 54 [2020-10-29 09:26:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:32,618 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 220 transitions. [2020-10-29 09:26:32,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:26:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 220 transitions. [2020-10-29 09:26:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:32,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:32,618 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:32,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:26:32,619 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:32,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash 423475952, now seen corresponding path program 11 times [2020-10-29 09:26:32,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:32,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806892731] [2020-10-29 09:26:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:32,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:33,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:33,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:36,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:36,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:36,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:26:36,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4246 [2020-10-29 09:26:36,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:36,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:36,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:26:36,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:36,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:26:36,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:37,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:37,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:37,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:26:37,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806892731] [2020-10-29 09:26:37,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:37,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:26:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951545505] [2020-10-29 09:26:37,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:26:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:26:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:26:37,849 INFO L87 Difference]: Start difference. First operand 199 states and 220 transitions. Second operand 19 states. [2020-10-29 09:26:38,472 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 09:26:38,669 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-29 09:26:38,878 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-29 09:26:39,119 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-29 09:26:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:39,603 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2020-10-29 09:26:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:26:39,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-29 09:26:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:39,605 INFO L225 Difference]: With dead ends: 232 [2020-10-29 09:26:39,606 INFO L226 Difference]: Without dead ends: 201 [2020-10-29 09:26:39,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:26:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-29 09:26:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-29 09:26:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:26:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 218 transitions. [2020-10-29 09:26:39,630 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 218 transitions. Word has length 54 [2020-10-29 09:26:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:39,631 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 218 transitions. [2020-10-29 09:26:39,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:26:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 218 transitions. [2020-10-29 09:26:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:39,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:39,632 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:39,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:26:39,632 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash 839557552, now seen corresponding path program 12 times [2020-10-29 09:26:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:39,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965114664] [2020-10-29 09:26:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:40,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:40,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:26:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:42,173 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-29 09:26:42,387 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-29 09:26:42,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:42,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:42,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:42,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:42,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:42,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:42,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:42,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:42,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:42,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:42,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:26:43,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965114664] [2020-10-29 09:26:43,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:43,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:26:43,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145296838] [2020-10-29 09:26:43,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:26:43,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:43,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:26:43,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:26:43,004 INFO L87 Difference]: Start difference. First operand 199 states and 218 transitions. Second operand 20 states. [2020-10-29 09:26:43,667 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-29 09:26:43,894 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-29 09:26:44,336 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-29 09:26:44,751 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-29 09:26:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:45,470 INFO L93 Difference]: Finished difference Result 232 states and 252 transitions. [2020-10-29 09:26:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:26:45,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-29 09:26:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:45,473 INFO L225 Difference]: With dead ends: 232 [2020-10-29 09:26:45,473 INFO L226 Difference]: Without dead ends: 209 [2020-10-29 09:26:45,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:26:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-29 09:26:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2020-10-29 09:26:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:26:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2020-10-29 09:26:45,499 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 54 [2020-10-29 09:26:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:45,499 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2020-10-29 09:26:45,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:26:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2020-10-29 09:26:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:45,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:45,500 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:45,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:26:45,500 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2094590064, now seen corresponding path program 13 times [2020-10-29 09:26:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:45,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98775039] [2020-10-29 09:26:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:45,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:46,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:46,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:46,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:26:46,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:47,367 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:26:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:26:48,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98775039] [2020-10-29 09:26:48,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:48,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:26:48,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060510522] [2020-10-29 09:26:48,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:26:48,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:48,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:26:48,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:26:48,037 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand 21 states. [2020-10-29 09:26:48,648 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-29 09:26:48,845 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-29 09:26:49,225 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:26:49,425 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:26:49,925 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-10-29 09:26:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:50,719 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2020-10-29 09:26:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:26:50,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-29 09:26:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:50,722 INFO L225 Difference]: With dead ends: 234 [2020-10-29 09:26:50,722 INFO L226 Difference]: Without dead ends: 211 [2020-10-29 09:26:50,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:26:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-29 09:26:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 199. [2020-10-29 09:26:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:26:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 216 transitions. [2020-10-29 09:26:50,744 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 216 transitions. Word has length 54 [2020-10-29 09:26:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:50,744 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 216 transitions. [2020-10-29 09:26:50,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:26:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 216 transitions. [2020-10-29 09:26:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:50,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:50,745 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:50,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:26:50,745 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:50,746 INFO L82 PathProgramCache]: Analyzing trace with hash -245854416, now seen corresponding path program 9 times [2020-10-29 09:26:50,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:50,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375557662] [2020-10-29 09:26:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:51,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:51,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:51,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:51,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-29 09:26:51,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:51,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:26:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:51,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:26:51,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:52,057 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 09:26:52,278 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-29 09:26:53,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:53,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:53,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:53,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:53,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:26:53,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:53,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:53,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:53,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:53,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:53,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:53,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375557662] [2020-10-29 09:26:53,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:53,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:26:53,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531565038] [2020-10-29 09:26:53,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:26:53,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:26:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:26:53,135 INFO L87 Difference]: Start difference. First operand 199 states and 216 transitions. Second operand 22 states. [2020-10-29 09:26:53,686 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-29 09:26:54,125 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:26:54,611 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-29 09:26:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:55,632 INFO L93 Difference]: Finished difference Result 231 states and 249 transitions. [2020-10-29 09:26:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:26:55,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-29 09:26:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:55,635 INFO L225 Difference]: With dead ends: 231 [2020-10-29 09:26:55,635 INFO L226 Difference]: Without dead ends: 208 [2020-10-29 09:26:55,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:26:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-29 09:26:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2020-10-29 09:26:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-29 09:26:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2020-10-29 09:26:55,657 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 54 [2020-10-29 09:26:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:55,658 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2020-10-29 09:26:55,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:26:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2020-10-29 09:26:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:26:55,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:55,659 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:55,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:26:55,659 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1915810335, now seen corresponding path program 14 times [2020-10-29 09:26:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:55,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358111377] [2020-10-29 09:26:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:56,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:56,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:26:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:57,136 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-29 09:26:57,381 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-29 09:26:57,667 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-29 09:26:58,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:58,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:58,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:58,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:58,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358111377] [2020-10-29 09:26:58,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:58,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:26:58,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934895082] [2020-10-29 09:26:58,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:26:58,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:58,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:26:58,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:26:58,308 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand 23 states. [2020-10-29 09:26:59,235 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-29 09:26:59,465 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-29 09:26:59,909 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 09:27:00,212 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-29 09:27:00,543 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-29 09:27:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:01,283 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2020-10-29 09:27:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:27:01,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-29 09:27:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:01,285 INFO L225 Difference]: With dead ends: 204 [2020-10-29 09:27:01,286 INFO L226 Difference]: Without dead ends: 196 [2020-10-29 09:27:01,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:27:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-29 09:27:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-29 09:27:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-29 09:27:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2020-10-29 09:27:01,308 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 54 [2020-10-29 09:27:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:01,308 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2020-10-29 09:27:01,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:27:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2020-10-29 09:27:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:27:01,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:01,310 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:01,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:27:01,310 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:01,310 INFO L82 PathProgramCache]: Analyzing trace with hash -124498276, now seen corresponding path program 22 times [2020-10-29 09:27:01,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:01,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080014934] [2020-10-29 09:27:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:01,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:02,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:02,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:27:02,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1205 [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:27:02,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:03,110 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 09:27:03,258 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-29 09:27:03,478 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-29 09:27:03,622 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-29 09:27:03,826 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-29 09:27:04,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:04,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:04,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080014934] [2020-10-29 09:27:04,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:04,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:27:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184154193] [2020-10-29 09:27:04,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:27:04,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:04,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:27:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:27:04,819 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 24 states. [2020-10-29 09:27:05,503 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-29 09:27:05,727 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-29 09:27:06,158 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 09:27:06,401 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:27:06,582 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-29 09:27:06,875 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-29 09:27:07,133 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-29 09:27:07,346 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:27:07,787 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2020-10-29 09:27:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:09,016 INFO L93 Difference]: Finished difference Result 300 states and 325 transitions. [2020-10-29 09:27:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:27:09,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-29 09:27:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:09,019 INFO L225 Difference]: With dead ends: 300 [2020-10-29 09:27:09,019 INFO L226 Difference]: Without dead ends: 294 [2020-10-29 09:27:09,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:27:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-29 09:27:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 246. [2020-10-29 09:27:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-29 09:27:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 269 transitions. [2020-10-29 09:27:09,053 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 269 transitions. Word has length 56 [2020-10-29 09:27:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:09,053 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 269 transitions. [2020-10-29 09:27:09,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:27:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 269 transitions. [2020-10-29 09:27:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:27:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:09,054 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:09,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:27:09,054 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:09,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2049366300, now seen corresponding path program 10 times [2020-10-29 09:27:09,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:09,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617016759] [2020-10-29 09:27:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:27:10,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:10,493 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-29 09:27:10,629 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-29 09:27:10,870 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-29 09:27:11,210 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-29 09:27:11,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:11,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:11,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:11,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:11,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:11,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617016759] [2020-10-29 09:27:11,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:11,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:27:11,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248981282] [2020-10-29 09:27:11,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:27:11,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:27:11,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:27:11,994 INFO L87 Difference]: Start difference. First operand 246 states and 269 transitions. Second operand 24 states. [2020-10-29 09:27:13,601 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-10-29 09:27:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:14,751 INFO L93 Difference]: Finished difference Result 287 states and 313 transitions. [2020-10-29 09:27:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:27:14,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-29 09:27:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:14,754 INFO L225 Difference]: With dead ends: 287 [2020-10-29 09:27:14,754 INFO L226 Difference]: Without dead ends: 279 [2020-10-29 09:27:14,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:27:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-29 09:27:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 255. [2020-10-29 09:27:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-29 09:27:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 280 transitions. [2020-10-29 09:27:14,782 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 280 transitions. Word has length 56 [2020-10-29 09:27:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:14,783 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 280 transitions. [2020-10-29 09:27:14,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:27:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 280 transitions. [2020-10-29 09:27:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:27:14,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:14,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:14,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:27:14,784 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 131548759, now seen corresponding path program 23 times [2020-10-29 09:27:14,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:14,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880395465] [2020-10-29 09:27:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:14,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:15,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:15,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:27:15,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-29 09:27:15,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:15,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:27:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:15,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:27:15,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:16,590 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-29 09:27:16,860 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-29 09:27:17,187 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 09:27:17,352 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-29 09:27:17,512 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-29 09:27:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:18,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:18,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:18,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880395465] [2020-10-29 09:27:18,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:18,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:27:18,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556183675] [2020-10-29 09:27:18,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:27:18,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:27:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:27:18,249 INFO L87 Difference]: Start difference. First operand 255 states and 280 transitions. Second operand 25 states. [2020-10-29 09:27:19,464 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-29 09:27:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:20,978 INFO L93 Difference]: Finished difference Result 323 states and 351 transitions. [2020-10-29 09:27:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:27:20,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-29 09:27:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:20,981 INFO L225 Difference]: With dead ends: 323 [2020-10-29 09:27:20,982 INFO L226 Difference]: Without dead ends: 317 [2020-10-29 09:27:20,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:27:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-29 09:27:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 273. [2020-10-29 09:27:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-29 09:27:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 299 transitions. [2020-10-29 09:27:21,017 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 299 transitions. Word has length 58 [2020-10-29 09:27:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:21,017 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 299 transitions. [2020-10-29 09:27:21,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:27:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 299 transitions. [2020-10-29 09:27:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:21,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:21,019 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:21,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:27:21,019 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1379613522, now seen corresponding path program 24 times [2020-10-29 09:27:21,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:21,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933796674] [2020-10-29 09:27:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:22,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:22,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:22,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:22,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-29 09:27:22,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:22,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:27:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:27:22,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:22,949 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-29 09:27:23,176 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-29 09:27:23,482 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-29 09:27:23,614 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-29 09:27:23,851 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-29 09:27:24,016 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-29 09:27:24,186 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-29 09:27:24,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:24,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:24,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:24,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:24,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:24,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:27:24,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:24,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:24,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:24,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:27:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933796674] [2020-10-29 09:27:25,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:25,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:27:25,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818875622] [2020-10-29 09:27:25,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:27:25,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:27:25,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:27:25,013 INFO L87 Difference]: Start difference. First operand 273 states and 299 transitions. Second operand 25 states. [2020-10-29 09:27:26,246 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:27:26,475 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:27:26,796 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:27:27,043 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:27:27,416 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-29 09:27:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:28,929 INFO L93 Difference]: Finished difference Result 325 states and 353 transitions. [2020-10-29 09:27:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:27:28,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-29 09:27:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:28,932 INFO L225 Difference]: With dead ends: 325 [2020-10-29 09:27:28,932 INFO L226 Difference]: Without dead ends: 288 [2020-10-29 09:27:28,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:27:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-29 09:27:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 229. [2020-10-29 09:27:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-29 09:27:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 249 transitions. [2020-10-29 09:27:28,963 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 249 transitions. Word has length 60 [2020-10-29 09:27:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:28,963 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 249 transitions. [2020-10-29 09:27:28,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:27:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 249 transitions. [2020-10-29 09:27:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:28,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:28,964 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:28,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:27:28,964 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:28,965 INFO L82 PathProgramCache]: Analyzing trace with hash -513817149, now seen corresponding path program 25 times [2020-10-29 09:27:28,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483872864] [2020-10-29 09:27:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:30,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:30,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:30,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1291 [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:27:30,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:30,805 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-29 09:27:31,012 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-29 09:27:31,291 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-29 09:27:31,420 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-29 09:27:31,615 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-29 09:27:31,981 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-29 09:27:32,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:32,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:32,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:32,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483872864] [2020-10-29 09:27:32,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:32,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:27:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861768910] [2020-10-29 09:27:32,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:27:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:27:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:27:32,939 INFO L87 Difference]: Start difference. First operand 229 states and 249 transitions. Second operand 26 states. [2020-10-29 09:27:34,001 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-29 09:27:34,277 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-29 09:27:34,457 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:27:34,751 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:27:35,012 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:27:35,220 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-29 09:27:35,634 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-29 09:27:36,024 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2020-10-29 09:27:36,379 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-29 09:27:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:37,485 INFO L93 Difference]: Finished difference Result 271 states and 294 transitions. [2020-10-29 09:27:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:27:37,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-29 09:27:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:37,487 INFO L225 Difference]: With dead ends: 271 [2020-10-29 09:27:37,488 INFO L226 Difference]: Without dead ends: 265 [2020-10-29 09:27:37,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:27:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-29 09:27:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 250. [2020-10-29 09:27:37,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-29 09:27:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 273 transitions. [2020-10-29 09:27:37,514 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 273 transitions. Word has length 60 [2020-10-29 09:27:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:37,514 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 273 transitions. [2020-10-29 09:27:37,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:27:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 273 transitions. [2020-10-29 09:27:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:37,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:37,515 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:37,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:27:37,515 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash 495039890, now seen corresponding path program 15 times [2020-10-29 09:27:37,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:37,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43311816] [2020-10-29 09:27:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:38,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:41,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:41,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:41,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:27:41,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3800 [2020-10-29 09:27:41,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:41,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:27:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:27:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:41,784 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-29 09:27:41,985 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-29 09:27:42,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:42,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:42,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:42,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:42,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:42,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:42,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:42,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:42,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:42,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-29 09:27:42,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43311816] [2020-10-29 09:27:42,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:42,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:27:42,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645319081] [2020-10-29 09:27:42,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:27:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:27:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:27:42,707 INFO L87 Difference]: Start difference. First operand 250 states and 273 transitions. Second operand 22 states. [2020-10-29 09:27:43,659 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-29 09:27:43,875 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-29 09:27:44,341 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-29 09:27:44,643 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-29 09:27:44,981 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 94 [2020-10-29 09:27:45,379 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 88 [2020-10-29 09:27:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:46,117 INFO L93 Difference]: Finished difference Result 285 states and 311 transitions. [2020-10-29 09:27:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:27:46,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-29 09:27:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:46,120 INFO L225 Difference]: With dead ends: 285 [2020-10-29 09:27:46,120 INFO L226 Difference]: Without dead ends: 252 [2020-10-29 09:27:46,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:27:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-29 09:27:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2020-10-29 09:27:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-29 09:27:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 271 transitions. [2020-10-29 09:27:46,147 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 271 transitions. Word has length 60 [2020-10-29 09:27:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:46,147 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 271 transitions. [2020-10-29 09:27:46,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:27:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 271 transitions. [2020-10-29 09:27:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:46,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:46,148 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:46,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:27:46,149 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 917498962, now seen corresponding path program 16 times [2020-10-29 09:27:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:46,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592213974] [2020-10-29 09:27:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:46,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:46,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:47,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:49,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:49,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:49,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:27:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3237 [2020-10-29 09:27:49,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:49,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:27:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:49,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:27:49,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:49,878 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-29 09:27:50,111 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:27:51,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:51,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 09:27:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592213974] [2020-10-29 09:27:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:27:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068460811] [2020-10-29 09:27:51,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:27:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:27:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:27:51,056 INFO L87 Difference]: Start difference. First operand 250 states and 271 transitions. Second operand 23 states. [2020-10-29 09:27:52,392 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-29 09:27:52,864 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-10-29 09:27:53,190 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-29 09:27:53,387 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:27:53,940 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-29 09:27:54,190 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:27:54,541 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2020-10-29 09:27:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:55,632 INFO L93 Difference]: Finished difference Result 287 states and 309 transitions. [2020-10-29 09:27:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:27:55,633 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-10-29 09:27:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:55,635 INFO L225 Difference]: With dead ends: 287 [2020-10-29 09:27:55,635 INFO L226 Difference]: Without dead ends: 262 [2020-10-29 09:27:55,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:27:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-29 09:27:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 250. [2020-10-29 09:27:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-29 09:27:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 270 transitions. [2020-10-29 09:27:55,659 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 270 transitions. Word has length 60 [2020-10-29 09:27:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:55,659 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 270 transitions. [2020-10-29 09:27:55,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:27:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 270 transitions. [2020-10-29 09:27:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:27:55,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:55,660 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:55,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:27:55,661 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash 117932818, now seen corresponding path program 17 times [2020-10-29 09:27:55,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:55,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813033569] [2020-10-29 09:27:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:56,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:57,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2090 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:27:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:58,550 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-29 09:27:58,834 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-29 09:27:59,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:59,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:59,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:59,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:59,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:27:59,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813033569] [2020-10-29 09:27:59,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:59,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:27:59,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715965128] [2020-10-29 09:27:59,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:27:59,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:27:59,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:27:59,618 INFO L87 Difference]: Start difference. First operand 250 states and 270 transitions. Second operand 24 states. [2020-10-29 09:28:00,905 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-29 09:28:01,382 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-29 09:28:01,703 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-29 09:28:01,896 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:28:02,263 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-29 09:28:02,596 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-29 09:28:02,802 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66