/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=DEEPEST --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-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:04:12,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:04:12,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:04:12,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:04:12,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:04:12,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:04:12,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:04:12,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:04:12,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:04:12,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:04:12,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:04:12,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:04:12,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:04:12,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:04:12,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:04:12,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:04:12,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:04:12,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:04:12,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:04:12,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:04:12,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:04:12,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:04:12,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:04:12,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:04:12,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:04:12,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:04:12,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:04:12,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:04:12,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:04:12,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:04:12,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:04:12,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:04:12,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:04:12,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:04:12,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:04:12,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:04:12,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:04:12,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:04:12,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:04:12,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:04:12,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:04:12,479 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 [2020-10-27 20:04:12,529 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:04:12,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:04:12,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:04:12,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:04:12,531 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:04:12,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:04:12,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:04:12,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:04:12,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:04:12,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:04:12,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:04:12,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:04:12,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:04:12,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:04:12,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:04:12,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:04:12,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:04:12,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:04:12,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:04:12,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:04:12,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:04:12,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:04:12,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:04:12,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:04:12,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:04:12,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:04:12,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:04:12,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:04:12,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:04:12,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:04:12,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:04:12,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:04:12,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:04:12,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:04:12,981 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:04:12,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2020-10-27 20:04:13,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e712d2bf/948bc7a2fe1f4c86a9368918d1ad956d/FLAGff554f854 [2020-10-27 20:04:13,895 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:04:13,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2020-10-27 20:04:13,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e712d2bf/948bc7a2fe1f4c86a9368918d1ad956d/FLAGff554f854 [2020-10-27 20:04:14,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e712d2bf/948bc7a2fe1f4c86a9368918d1ad956d [2020-10-27 20:04:14,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:04:14,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:04:14,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:04:14,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:04:14,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:04:14,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:14,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d7d2eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14, skipping insertion in model container [2020-10-27 20:04:14,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:14,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:04:14,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:04:14,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:04:14,743 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:04:14,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:04:14,907 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:04:14,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14 WrapperNode [2020-10-27 20:04:14,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:04:14,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:04:14,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:04:14,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:04:14,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:14,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:14,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:14,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:14,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:15,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:15,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (1/1) ... [2020-10-27 20:04:15,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:04:15,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:04:15,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:04:15,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:04:15,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (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 [2020-10-27 20:04:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:04:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:04:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:04:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:04:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:04:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:04:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-27 20:04:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-10-27 20:04:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2020-10-27 20:04:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2020-10-27 20:04:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:04:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:04:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:04:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:04:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:04:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:04:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:04:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:04:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:04:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:04:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:04:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:04:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:04:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:04:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:04:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:04:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:04:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:04:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:04:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:04:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:04:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:04:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:04:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:04:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:04:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:04:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:04:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:04:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:04:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:04:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:04:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:04:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:04:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:04:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:04:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:04:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:04:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:04:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:04:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:04:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:04:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:04:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:04:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:04:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:04:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:04:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:04:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:04:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:04:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:04:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:04:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:04:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:04:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:04:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:04:15,127 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:04:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:04:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:04:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:04:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:04:15,128 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:04:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:04:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:04:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 20:04:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:04:15,129 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:04:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:04:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:04:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:04:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:04:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:04:15,130 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:04:15,131 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:04:15,131 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:04:15,131 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:04:15,131 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:04:15,131 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:04:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:04:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:04:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:04:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:04:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:04:15,132 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:04:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:04:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:04:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:04:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:04:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:04:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:04:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:04:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:04:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:04:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:04:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:04:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:04:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:04:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:04:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:04:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:04:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:04:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:04:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:04:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:04:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:04:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:04:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:04:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:04:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:04:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:04:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:04:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:04:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:04:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-27 20:04:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:04:15,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:04:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:04:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-10-27 20:04:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2020-10-27 20:04:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:04:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:04:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2020-10-27 20:04:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:04:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 20:04:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:04:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:04:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:04:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:04:15,684 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:04:15,890 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:04:15,890 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 20:04:15,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:04:15 BoogieIcfgContainer [2020-10-27 20:04:15,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:04:15,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:04:15,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:04:15,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:04:15,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:04:14" (1/3) ... [2020-10-27 20:04:15,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217c220d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:04:15, skipping insertion in model container [2020-10-27 20:04:15,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:04:14" (2/3) ... [2020-10-27 20:04:15,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217c220d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:04:15, skipping insertion in model container [2020-10-27 20:04:15,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:04:15" (3/3) ... [2020-10-27 20:04:15,902 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2020-10-27 20:04:15,915 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:04:15,922 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:04:15,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:04:15,965 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:04:15,965 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:04:15,965 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:04:15,965 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:04:15,966 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:04:15,966 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:04:15,966 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:04:15,966 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:04:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-27 20:04:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:04:15,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:15,993 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:15,994 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1234755749, now seen corresponding path program 1 times [2020-10-27 20:04:16,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:16,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938073143] [2020-10-27 20:04:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:16,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:18,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:18,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:04:18,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:04:18,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2510 [2020-10-27 20:04:18,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:04:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:04:18,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:04:18,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:18,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:18,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:18,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:18,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:04:18,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:18,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:18,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:18,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:18,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:18,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:18,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:18,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:18,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:18,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:18,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:18,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:18,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:18,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:04:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:19,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:19,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:19,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:19,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:19,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:19,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-27 20:04:19,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:04:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:04:19,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:19,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:19,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:19,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:19,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:19,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:19,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 20:04:19,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:04:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:19,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:19,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938073143] [2020-10-27 20:04:19,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:19,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 20:04:19,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772965854] [2020-10-27 20:04:19,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:04:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:04:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:04:19,629 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 12 states. [2020-10-27 20:04:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:20,405 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-27 20:04:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:04:20,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 20:04:20,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:20,418 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:04:20,418 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:20,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:04:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-27 20:04:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:04:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 20:04:20,470 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 32 [2020-10-27 20:04:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:20,471 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 20:04:20,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:04:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 20:04:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:04:20,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:20,473 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:20,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:04:20,473 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1236364463, now seen corresponding path program 1 times [2020-10-27 20:04:20,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:20,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019579857] [2020-10-27 20:04:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:20,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:21,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:04:21,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:21,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-27 20:04:21,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:04:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:21,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:21,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:21,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:21,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:21,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:21,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:21,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:21,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:21,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:21,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:21,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:04:21,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:21,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:04:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:04:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:21,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:21,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-27 20:04:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:21,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:21,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:21,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:04:21,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:04:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:21,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:21,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:21,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:21,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:21,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:21,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:21,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:04:21,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:21,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:21,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:21,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:21,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:21,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019579857] [2020-10-27 20:04:21,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:21,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:04:21,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002947747] [2020-10-27 20:04:21,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:04:21,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:21,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:04:21,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:04:21,816 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2020-10-27 20:04:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:22,348 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-27 20:04:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:04:22,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 20:04:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:22,351 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:04:22,351 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:22,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:04:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-27 20:04:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 20:04:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 20:04:22,362 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2020-10-27 20:04:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:22,363 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 20:04:22,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:04:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 20:04:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:04:22,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:22,365 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:22,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:04:22,365 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1108323424, now seen corresponding path program 1 times [2020-10-27 20:04:22,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:22,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830764136] [2020-10-27 20:04:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:27,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:04:27,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:04:27,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:04:27,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:04:27,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:04:27,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:27,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:27,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:27,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:27,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:27,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:27,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:27,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:27,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:27,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:27,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:27,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:27,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:27,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 20:04:27,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:04:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:04:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:27,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:27,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:27,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:27,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:27,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:04:27,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:04:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:27,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:27,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:27,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:27,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830764136] [2020-10-27 20:04:27,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:27,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:04:27,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956292941] [2020-10-27 20:04:27,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:04:27,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:04:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:04:27,558 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-10-27 20:04:27,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:27,738 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2020-10-27 20:04:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:04:27,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-27 20:04:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:27,740 INFO L225 Difference]: With dead ends: 75 [2020-10-27 20:04:27,740 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:27,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:04:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:04:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:04:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-27 20:04:27,750 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 37 [2020-10-27 20:04:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:27,750 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-27 20:04:27,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:04:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-27 20:04:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:04:27,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:27,752 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:27,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:04:27,752 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1170363038, now seen corresponding path program 1 times [2020-10-27 20:04:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:27,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473771485] [2020-10-27 20:04:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:27,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:27,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:28,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:32,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:32,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:04:32,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:04:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:04:32,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:04:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:04:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:32,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:32,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:32,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:32,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:04:32,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:32,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:32,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:32,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:33,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:33,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:33,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 20:04:33,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:04:33,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:33,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:33,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:33,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 20:04:33,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:33,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:04:33,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:33,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:33,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:33,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:33,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:33,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:33,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:33,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:33,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 20:04:33,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:33,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:33,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:33,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473771485] [2020-10-27 20:04:33,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:33,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 20:04:33,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657609073] [2020-10-27 20:04:33,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:04:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:04:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:04:33,780 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 16 states. [2020-10-27 20:04:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:34,711 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-27 20:04:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:04:34,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 20:04:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:34,713 INFO L225 Difference]: With dead ends: 78 [2020-10-27 20:04:34,713 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:34,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:04:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:04:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:04:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 20:04:34,733 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-27 20:04:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:34,734 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 20:04:34,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:04:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 20:04:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:04:34,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:34,735 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:34,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:04:34,735 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1563390048, now seen corresponding path program 1 times [2020-10-27 20:04:34,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:34,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094303967] [2020-10-27 20:04:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:34,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:37,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:37,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 20:04:37,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2350 [2020-10-27 20:04:37,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:04:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:04:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:37,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:37,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:37,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:37,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:37,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:37,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:04:37,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:37,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:37,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:04:37,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:37,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:37,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:37,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:04:37,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:04:37,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:37,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:37,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:37,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:37,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:37,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:37,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 20:04:37,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:04:37,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:37,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:37,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:38,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:38,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:38,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:38,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 20:04:38,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:04:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:38,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:38,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:38,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094303967] [2020-10-27 20:04:38,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:04:38,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-27 20:04:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996563596] [2020-10-27 20:04:38,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:04:38,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:04:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:04:38,398 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 20 states. [2020-10-27 20:04:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:39,520 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 20:04:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:04:39,520 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-10-27 20:04:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:39,521 INFO L225 Difference]: With dead ends: 48 [2020-10-27 20:04:39,522 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:04:39,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:04:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:04:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 20:04:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 20:04:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-27 20:04:39,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-27 20:04:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:39,532 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-27 20:04:39,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:04:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-27 20:04:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:04:39,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:39,533 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:39,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:04:39,534 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash -830757871, now seen corresponding path program 1 times [2020-10-27 20:04:39,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:39,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47068936] [2020-10-27 20:04:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:39,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:39,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:04:41,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:41,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-27 20:04:41,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 20:04:41,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:04:41,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:41,428 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-10-27 20:04:41,599 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2020-10-27 20:04:41,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:41,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:41,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:41,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:41,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:41,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:41,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:41,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:41,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:41,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:04:41,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:41,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:41,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:41,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:41,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:41,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:41,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:04:41,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:42,880 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 69 [2020-10-27 20:04:43,313 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-10-27 20:04:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:43,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:43,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:43,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:43,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:43,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 20:04:43,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:43,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:43,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:04:43,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:04:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:04:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47068936] [2020-10-27 20:04:43,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:43,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:04:43,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682555736] [2020-10-27 20:04:43,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:04:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:04:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:04:43,460 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-10-27 20:04:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:44,288 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-27 20:04:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:04:44,290 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 20:04:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:44,291 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:04:44,291 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:04:44,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:04:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:04:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 20:04:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:04:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 20:04:44,312 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-27 20:04:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:44,313 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 20:04:44,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:04:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 20:04:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 20:04:44,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:44,316 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:44,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:04:44,317 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash -829149157, now seen corresponding path program 1 times [2020-10-27 20:04:44,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:44,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795444589] [2020-10-27 20:04:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:44,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:45,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:45,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:04:45,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:45,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-10-27 20:04:45,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:04:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:04:45,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:46,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:46,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:46,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:46,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:46,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:46,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:46,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:46,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:46,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:46,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:46,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:46,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:46,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:46,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:46,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 20:04:46,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:46,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:04:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:46,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:46,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:46,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:46,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:46,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 20:04:46,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:46,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:04:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:46,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:47,372 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-27 20:04:47,705 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-27 20:04:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:47,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:47,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:47,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:47,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 20:04:47,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:47,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:04:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:04:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:48,704 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 41 [2020-10-27 20:04:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795444589] [2020-10-27 20:04:48,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:48,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:04:48,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627296348] [2020-10-27 20:04:48,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:04:48,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:48,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:04:48,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:04:48,732 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 24 states. [2020-10-27 20:04:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:50,666 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-27 20:04:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:04:50,667 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-10-27 20:04:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:50,668 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:04:50,668 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:04:50,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:04:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:04:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:04:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:04:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 20:04:50,683 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-27 20:04:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:50,683 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 20:04:50,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:04:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 20:04:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:04:50,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:50,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:50,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:04:50,686 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2041536780, now seen corresponding path program 2 times [2020-10-27 20:04:50,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:50,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748814825] [2020-10-27 20:04:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:04:51,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:51,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-27 20:04:51,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:04:51,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:04:51,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 20:04:51,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:51,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:04:51,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:51,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:51,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:51,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 20:04:51,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:04:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:04:51,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:51,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 20:04:51,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:04:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:04:51,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:04:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:51,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:51,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:51,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:04:51,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:51,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:04:51,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:51,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:51,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:04:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748814825] [2020-10-27 20:04:51,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:04:51,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:04:51,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321638376] [2020-10-27 20:04:51,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:04:51,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:04:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:04:51,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:04:51,873 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 12 states. [2020-10-27 20:04:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:04:52,354 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-27 20:04:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:04:52,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-27 20:04:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:04:52,358 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:04:52,358 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:04:52,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:04:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:04:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-10-27 20:04:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:04:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-27 20:04:52,386 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 41 [2020-10-27 20:04:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:04:52,387 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-27 20:04:52,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:04:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-27 20:04:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:04:52,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:04:52,390 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:04:52,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:04:52,390 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:04:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:04:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2043145494, now seen corresponding path program 2 times [2020-10-27 20:04:52,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:04:52,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11245876] [2020-10-27 20:04:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:04:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:52,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:53,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:55,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:57,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:04:57,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:57,721 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-27 20:04:57,898 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-27 20:04:58,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:04:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:58,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:58,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:58,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:04:58,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:58,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:04:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:58,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:58,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:58,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:04:58,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:04:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 20:04:58,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:04:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:04:58,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:04:58,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:04:58,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:04:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:04:58,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:04:58,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:04:58,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:04:58,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:04:58,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-27 20:04:58,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:04:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:04:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:04:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:04:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:00,491 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 163 DAG size of output: 119 [2020-10-27 20:05:01,452 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 109 [2020-10-27 20:05:01,920 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-27 20:05:01,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:01,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:01,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:01,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:02,260 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-27 20:05:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:05:02,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11245876] [2020-10-27 20:05:02,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:02,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:05:02,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627971747] [2020-10-27 20:05:02,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:05:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:05:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:05:02,287 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 26 states. [2020-10-27 20:05:04,042 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-27 20:05:05,731 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 185 DAG size of output: 134 [2020-10-27 20:05:06,366 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 20:05:06,627 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 20:05:07,035 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2020-10-27 20:05:07,490 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-27 20:05:07,815 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-27 20:05:08,156 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-27 20:05:08,435 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 20:05:08,708 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-27 20:05:08,970 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-27 20:05:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:09,222 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-27 20:05:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:05:09,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 41 [2020-10-27 20:05:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:09,224 INFO L225 Difference]: With dead ends: 72 [2020-10-27 20:05:09,224 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:05:09,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:05:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:05:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-27 20:05:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:05:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-27 20:05:09,238 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 41 [2020-10-27 20:05:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:09,238 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-27 20:05:09,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:05:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-27 20:05:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:05:09,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:09,240 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:09,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:05:09,240 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash -788045633, now seen corresponding path program 1 times [2020-10-27 20:05:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:09,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484350019] [2020-10-27 20:05:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:10,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:10,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:05:10,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-27 20:05:10,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:05:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:05:10,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:10,979 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-27 20:05:11,269 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-27 20:05:11,477 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 20:05:11,634 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-10-27 20:05:11,759 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2020-10-27 20:05:11,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:11,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:11,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:11,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:12,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:12,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:12,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:12,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 20:05:12,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:12,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:05:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:12,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:05:12,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:05:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:12,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:12,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:12,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:05:12,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:12,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 20:05:12,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:05:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:05:12,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:13,105 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 20:05:14,775 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 191 DAG size of output: 139 [2020-10-27 20:05:16,093 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 184 DAG size of output: 142 [2020-10-27 20:05:16,664 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-10-27 20:05:16,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:16,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:16,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:16,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:16,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:16,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 20:05:16,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:16,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:05:16,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:16,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:16,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:17,021 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-27 20:05:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:05:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484350019] [2020-10-27 20:05:17,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:17,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:05:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749507936] [2020-10-27 20:05:17,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:05:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:05:17,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:05:17,046 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 25 states. [2020-10-27 20:05:18,798 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-27 20:05:19,118 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 20:05:19,552 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-27 20:05:20,351 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-27 20:05:21,132 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 20:05:21,519 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-27 20:05:21,718 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-27 20:05:22,021 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 20:05:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:22,573 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-27 20:05:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:05:22,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-27 20:05:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:22,576 INFO L225 Difference]: With dead ends: 76 [2020-10-27 20:05:22,576 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 20:05:22,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:05:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 20:05:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-27 20:05:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:05:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-27 20:05:22,591 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 46 [2020-10-27 20:05:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:22,591 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-27 20:05:22,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:05:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-27 20:05:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:05:22,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:22,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:22,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:05:22,593 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash -786436919, now seen corresponding path program 1 times [2020-10-27 20:05:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:22,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419655635] [2020-10-27 20:05:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:24,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 20:05:24,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:24,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:24,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:24,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:24,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:24,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:05:24,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:24,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:24,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:24,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:24,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:24,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:05:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:05:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:05:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:25,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:25,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:25,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:05:25,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:25,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 20:05:25,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:05:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:05:25,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:26,401 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-27 20:05:27,100 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 79 [2020-10-27 20:05:27,790 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 80 [2020-10-27 20:05:28,313 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-27 20:05:28,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:28,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:28,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:28,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:28,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 20:05:28,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:05:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:05:28,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:29,222 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-27 20:05:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:05:29,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419655635] [2020-10-27 20:05:29,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:29,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:05:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684194638] [2020-10-27 20:05:29,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:05:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:05:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=749, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:05:29,249 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 29 states. [2020-10-27 20:05:30,214 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-27 20:05:31,015 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 20:05:31,394 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 20:05:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:33,026 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-27 20:05:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:05:33,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-10-27 20:05:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:33,028 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:05:33,028 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 20:05:33,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:05:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 20:05:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-10-27 20:05:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 20:05:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-27 20:05:33,040 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 46 [2020-10-27 20:05:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:33,040 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-27 20:05:33,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:05:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-27 20:05:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 20:05:33,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:33,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:33,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:05:33,042 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash 652725063, now seen corresponding path program 3 times [2020-10-27 20:05:33,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:33,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802513527] [2020-10-27 20:05:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:34,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:36,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:37,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:05:38,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:05:38,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:38,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:38,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:38,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:38,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:38,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:05:38,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:38,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:38,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:38,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:38,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:38,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:38,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:38,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:38,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 20:05:38,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:05:38,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 20:05:38,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:05:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:05:38,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:05:38,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:38,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 20:05:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:38,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:05:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:38,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 20:05:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:38,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:38,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:05:38,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802513527] [2020-10-27 20:05:38,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:05:38,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:05:38,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965478980] [2020-10-27 20:05:38,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:05:38,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:05:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:05:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:05:38,360 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2020-10-27 20:05:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:05:38,844 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-27 20:05:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:05:38,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 20:05:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:05:38,850 INFO L225 Difference]: With dead ends: 89 [2020-10-27 20:05:38,850 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:05:38,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:05:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:05:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-27 20:05:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:05:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 20:05:38,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-27 20:05:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:05:38,862 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 20:05:38,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:05:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 20:05:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 20:05:38,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:05:38,863 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:05:38,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:05:38,864 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:05:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:05:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash 139933252, now seen corresponding path program 2 times [2020-10-27 20:05:38,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:05:38,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752535484] [2020-10-27 20:05:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:05:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:38,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:39,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:43,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:43,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 20:05:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:44,217 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-27 20:05:44,344 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2020-10-27 20:05:44,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:05:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:44,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:44,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:05:44,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:44,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 20:05:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:44,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:44,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:05:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:45,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 20:05:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:05:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:05:46,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:05:46,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 20:05:46,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:05:46,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 20:05:46,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:05:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:05:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 20:05:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:05:46,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:05:48,823 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 20:05:51,027 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 221 DAG size of output: 131 [2020-10-27 20:06:07,229 WARN L193 SmtUtils]: Spent 13.45 s on a formula simplification. DAG size of input: 312 DAG size of output: 208 [2020-10-27 20:08:04,480 WARN L193 SmtUtils]: Spent 1.79 m on a formula simplification. DAG size of input: 489 DAG size of output: 269