/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=SHALLOWEST --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-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:15:15,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:15:15,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:15:15,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:15:15,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:15:15,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:15:15,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:15:15,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:15:15,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:15:15,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:15:15,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:15:15,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:15:15,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:15:15,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:15:15,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:15:15,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:15:15,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:15:15,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:15:15,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:15:15,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:15:15,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:15:15,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:15:15,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:15:15,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:15:15,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:15:15,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:15:15,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:15:15,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:15:15,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:15:15,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:15:15,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:15:15,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:15:15,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:15:15,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:15:15,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:15:15,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:15:15,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:15:15,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:15:15,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:15:15,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:15:15,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:15:15,853 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 01:15:15,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:15:15,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:15:15,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:15:15,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:15:15,915 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:15:15,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:15:15,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:15:15,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:15:15,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:15:15,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:15:15,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:15:15,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:15:15,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:15:15,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:15:15,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:15:15,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:15:15,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:15:15,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:15:15,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:15:15,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:15:15,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:15:15,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:15:15,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:15:15,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:15:15,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:15:15,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:15:15,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:15:15,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:15:15,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:15:15,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:15:16,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:15:16,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:15:16,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:15:16,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:15:16,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:15:16,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-10-27 01:15:16,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b496df6bb/3469229203c4406396c3fe3596b8351f/FLAG42fbf5fb2 [2020-10-27 01:15:17,275 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:15:17,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-10-27 01:15:17,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b496df6bb/3469229203c4406396c3fe3596b8351f/FLAG42fbf5fb2 [2020-10-27 01:15:17,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b496df6bb/3469229203c4406396c3fe3596b8351f [2020-10-27 01:15:17,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:15:17,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:15:17,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:17,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:15:17,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:15:17,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:17" (1/1) ... [2020-10-27 01:15:17,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4560fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:17, skipping insertion in model container [2020-10-27 01:15:17,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:17" (1/1) ... [2020-10-27 01:15:17,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:15:17,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:15:18,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:18,024 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:15:18,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:18,136 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:15:18,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18 WrapperNode [2020-10-27 01:15:18,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:18,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:15:18,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:15:18,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:15:18,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (1/1) ... [2020-10-27 01:15:18,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:15:18,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:15:18,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:15:18,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:15:18,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (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 01:15:18,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:15:18,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:15:18,334 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:15:18,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:15:18,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:15:18,335 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:15:18,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:15:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:15:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:15:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:15:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:15:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:15:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:15:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:15:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:15:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:15:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:15:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:15:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:15:18,341 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:15:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:15:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:15:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:15:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:15:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:15:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:15:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:15:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:15:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:15:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:15:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:15:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:15:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:15:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:15:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:15:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:15:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:15:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:15:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:15:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:15:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:15:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:15:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:15:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:15:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:15:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:15:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:15:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:15:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:15:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:15:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:15:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:15:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:15:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:15:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:15:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:15:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:15:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:15:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:15:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:15:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:15:18,792 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:15:19,290 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:15:19,291 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 01:15:19,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:19 BoogieIcfgContainer [2020-10-27 01:15:19,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:15:19,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:15:19,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:15:19,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:15:19,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:15:17" (1/3) ... [2020-10-27 01:15:19,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe9d283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:19, skipping insertion in model container [2020-10-27 01:15:19,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:18" (2/3) ... [2020-10-27 01:15:19,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe9d283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:19, skipping insertion in model container [2020-10-27 01:15:19,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:19" (3/3) ... [2020-10-27 01:15:19,312 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-10-27 01:15:19,336 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:15:19,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:15:19,358 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:15:19,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:15:19,401 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:15:19,401 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:15:19,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:15:19,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:15:19,402 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:15:19,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:15:19,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:15:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-10-27 01:15:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:15:19,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:19,440 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] [2020-10-27 01:15:19,441 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1723059971, now seen corresponding path program 1 times [2020-10-27 01:15:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:19,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934214971] [2020-10-27 01:15:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:19,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:19,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:19,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:20,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:20,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:15:20,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:15:20,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-27 01:15:20,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:20,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:15:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:20,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:15:20,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:20,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:20,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:20,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:20,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:20,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:15:20,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:20,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:20,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:20,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:20,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:20,306 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 01:15:20,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934214971] [2020-10-27 01:15:20,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:20,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:15:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542403246] [2020-10-27 01:15:20,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:15:20,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:15:20,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:15:20,336 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-10-27 01:15:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:20,560 INFO L93 Difference]: Finished difference Result 115 states and 176 transitions. [2020-10-27 01:15:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:15:20,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-27 01:15:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:20,571 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:15:20,571 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:15:20,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:15:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:15:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:15:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:15:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2020-10-27 01:15:20,622 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 22 [2020-10-27 01:15:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:20,622 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2020-10-27 01:15:20,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:15:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2020-10-27 01:15:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:15:20,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:20,624 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] [2020-10-27 01:15:20,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:15:20,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:20,626 INFO L82 PathProgramCache]: Analyzing trace with hash 80260039, now seen corresponding path program 1 times [2020-10-27 01:15:20,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:20,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421129266] [2020-10-27 01:15:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:20,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:20,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:20,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:15:20,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:20,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-27 01:15:20,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:15:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:20,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:15:20,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:21,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:21,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:21,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:21,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:21,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:21,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:21,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:21,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:21,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:21,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:21,055 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 01:15:21,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421129266] [2020-10-27 01:15:21,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:21,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:15:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904984445] [2020-10-27 01:15:21,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:15:21,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:15:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:15:21,060 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand 4 states. [2020-10-27 01:15:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:21,253 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2020-10-27 01:15:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:15:21,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 01:15:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:21,256 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:15:21,256 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:15:21,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:15:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:15:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:15:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:15:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-10-27 01:15:21,268 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 27 [2020-10-27 01:15:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:21,268 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-10-27 01:15:21,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:15:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-10-27 01:15:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:15:21,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:21,270 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] [2020-10-27 01:15:21,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:15:21,270 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:21,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:21,271 INFO L82 PathProgramCache]: Analyzing trace with hash 510744340, now seen corresponding path program 1 times [2020-10-27 01:15:21,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:21,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501509454] [2020-10-27 01:15:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:21,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:21,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:21,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:15:21,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:15:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-27 01:15:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:15:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:21,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:21,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:21,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:21,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:21,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:21,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:21,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:21,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:21,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:21,924 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 01:15:21,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501509454] [2020-10-27 01:15:21,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:21,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:21,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257743293] [2020-10-27 01:15:21,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:21,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:21,931 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-10-27 01:15:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:22,498 INFO L93 Difference]: Finished difference Result 150 states and 216 transitions. [2020-10-27 01:15:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:15:22,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 01:15:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:22,501 INFO L225 Difference]: With dead ends: 150 [2020-10-27 01:15:22,501 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:15:22,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:15:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-27 01:15:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:15:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 115 transitions. [2020-10-27 01:15:22,515 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 115 transitions. Word has length 33 [2020-10-27 01:15:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:22,515 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 115 transitions. [2020-10-27 01:15:22,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 115 transitions. [2020-10-27 01:15:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:15:22,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:22,517 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] [2020-10-27 01:15:22,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:15:22,518 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:22,518 INFO L82 PathProgramCache]: Analyzing trace with hash 729599058, now seen corresponding path program 1 times [2020-10-27 01:15:22,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:22,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103326486] [2020-10-27 01:15:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:22,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:22,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:15:22,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:22,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 01:15:22,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:22,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:22,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:15:22,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:15:22,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:22,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:22,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:22,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:22,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:22,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:22,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:22,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:22,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:22,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:22,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:22,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:22,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103326486] [2020-10-27 01:15:22,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:22,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186101265] [2020-10-27 01:15:22,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:22,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:22,717 INFO L87 Difference]: Start difference. First operand 80 states and 115 transitions. Second operand 6 states. [2020-10-27 01:15:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:22,968 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2020-10-27 01:15:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:22,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 01:15:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:22,971 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:15:22,971 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:15:22,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:15:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-27 01:15:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:15:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2020-10-27 01:15:23,003 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 33 [2020-10-27 01:15:23,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:23,003 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2020-10-27 01:15:23,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2020-10-27 01:15:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:15:23,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:23,005 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] [2020-10-27 01:15:23,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:15:23,005 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 585622541, now seen corresponding path program 1 times [2020-10-27 01:15:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147883866] [2020-10-27 01:15:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:23,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:15:23,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:23,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 01:15:23,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:23,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:23,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:15:23,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:15:23,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:23,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:23,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:23,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:23,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:23,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:23,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:23,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147883866] [2020-10-27 01:15:23,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:23,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941579060] [2020-10-27 01:15:23,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:23,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:23,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:23,198 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand 6 states. [2020-10-27 01:15:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:23,434 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2020-10-27 01:15:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:23,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 01:15:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:23,436 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:15:23,437 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:15:23,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:15:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-27 01:15:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:15:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2020-10-27 01:15:23,447 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 35 [2020-10-27 01:15:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:23,447 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2020-10-27 01:15:23,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2020-10-27 01:15:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:15:23,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:23,449 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] [2020-10-27 01:15:23,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:15:23,449 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:23,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1777671693, now seen corresponding path program 1 times [2020-10-27 01:15:23,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:23,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200249165] [2020-10-27 01:15:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:23,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:15:23,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:23,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 01:15:23,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:23,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:23,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:15:23,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:15:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:23,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:23,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:23,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:23,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:23,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:23,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:23,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:23,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:23,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:23,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:23,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200249165] [2020-10-27 01:15:23,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:23,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92611425] [2020-10-27 01:15:23,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:23,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:23,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:23,632 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand 6 states. [2020-10-27 01:15:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:23,874 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2020-10-27 01:15:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:23,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 01:15:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:23,876 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:15:23,876 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:15:23,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:15:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2020-10-27 01:15:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:15:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2020-10-27 01:15:23,885 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 35 [2020-10-27 01:15:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:23,886 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2020-10-27 01:15:23,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2020-10-27 01:15:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:15:23,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:23,888 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] [2020-10-27 01:15:23,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:15:23,888 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1980453703, now seen corresponding path program 1 times [2020-10-27 01:15:23,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:23,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776366733] [2020-10-27 01:15:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:24,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:15:24,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:24,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 01:15:24,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:24,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:15:24,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:24,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:15:24,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:24,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:24,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:24,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:24,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:24,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:24,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:24,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:24,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776366733] [2020-10-27 01:15:24,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:24,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:15:24,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65598199] [2020-10-27 01:15:24,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:15:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:15:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:15:24,395 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand 9 states. [2020-10-27 01:15:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:24,829 INFO L93 Difference]: Finished difference Result 110 states and 150 transitions. [2020-10-27 01:15:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:24,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 01:15:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:24,830 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:15:24,831 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:15:24,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:15:24,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-10-27 01:15:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:15:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2020-10-27 01:15:24,848 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 128 transitions. Word has length 37 [2020-10-27 01:15:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:24,848 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 128 transitions. [2020-10-27 01:15:24,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:15:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 128 transitions. [2020-10-27 01:15:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:15:24,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:24,853 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] [2020-10-27 01:15:24,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:15:24,854 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1180142727, now seen corresponding path program 1 times [2020-10-27 01:15:24,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:24,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289959675] [2020-10-27 01:15:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:24,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:25,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:25,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:25,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:15:25,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-27 01:15:25,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:15:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:15:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:25,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:25,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:25,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:25,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:15:25,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:25,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289959675] [2020-10-27 01:15:25,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:25,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:15:25,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101089953] [2020-10-27 01:15:25,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:15:25,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:15:25,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:15:25,544 INFO L87 Difference]: Start difference. First operand 91 states and 128 transitions. Second operand 9 states. [2020-10-27 01:15:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:26,040 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2020-10-27 01:15:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:26,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 01:15:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:26,042 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:15:26,042 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:15:26,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:15:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2020-10-27 01:15:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:15:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2020-10-27 01:15:26,058 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 37 [2020-10-27 01:15:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:26,058 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2020-10-27 01:15:26,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:15:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2020-10-27 01:15:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:15:26,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:26,063 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] [2020-10-27 01:15:26,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:15:26,063 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash 167149748, now seen corresponding path program 1 times [2020-10-27 01:15:26,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:26,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528814180] [2020-10-27 01:15:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:15:26,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 01:15:26,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:26,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:26,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:26,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:26,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:26,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:26,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:26,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:15:26,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:26,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:26,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528814180] [2020-10-27 01:15:26,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:26,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:26,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287508301] [2020-10-27 01:15:26,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:26,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:26,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:26,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:26,511 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand 10 states. [2020-10-27 01:15:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:27,020 INFO L93 Difference]: Finished difference Result 123 states and 166 transitions. [2020-10-27 01:15:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:27,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 01:15:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:27,022 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:15:27,022 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:15:27,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:15:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2020-10-27 01:15:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:15:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 147 transitions. [2020-10-27 01:15:27,030 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 147 transitions. Word has length 39 [2020-10-27 01:15:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:27,031 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 147 transitions. [2020-10-27 01:15:27,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 147 transitions. [2020-10-27 01:15:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:27,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:27,032 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-27 01:15:27,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:15:27,033 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1237714927, now seen corresponding path program 1 times [2020-10-27 01:15:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:27,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641481484] [2020-10-27 01:15:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:27,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:27,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:27,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:27,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 01:15:27,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:27,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:15:27,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:27,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:27,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:27,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:27,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:27,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:15:27,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:27,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:27,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641481484] [2020-10-27 01:15:27,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:27,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648251582] [2020-10-27 01:15:27,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:27,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:27,506 INFO L87 Difference]: Start difference. First operand 106 states and 147 transitions. Second operand 10 states. [2020-10-27 01:15:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:28,051 INFO L93 Difference]: Finished difference Result 125 states and 168 transitions. [2020-10-27 01:15:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:28,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 01:15:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:28,053 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:15:28,053 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:15:28,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:15:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2020-10-27 01:15:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:15:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 135 transitions. [2020-10-27 01:15:28,061 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 135 transitions. Word has length 41 [2020-10-27 01:15:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:28,061 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 135 transitions. [2020-10-27 01:15:28,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 135 transitions. [2020-10-27 01:15:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:28,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:28,062 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:28,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:15:28,063 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1865203217, now seen corresponding path program 2 times [2020-10-27 01:15:28,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:28,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86011614] [2020-10-27 01:15:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:28,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:28,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:28,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 01:15:28,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:28,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:15:28,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:28,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:28,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86011614] [2020-10-27 01:15:28,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:28,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:28,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663583736] [2020-10-27 01:15:28,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:28,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:28,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:28,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:28,446 INFO L87 Difference]: Start difference. First operand 97 states and 135 transitions. Second operand 10 states. [2020-10-27 01:15:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:28,909 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2020-10-27 01:15:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:28,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 01:15:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:28,911 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:15:28,911 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:15:28,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:15:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-27 01:15:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:15:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 129 transitions. [2020-10-27 01:15:28,918 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 129 transitions. Word has length 41 [2020-10-27 01:15:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:28,918 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 129 transitions. [2020-10-27 01:15:28,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 129 transitions. [2020-10-27 01:15:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:28,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:28,919 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:28,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:15:28,919 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 791151008, now seen corresponding path program 2 times [2020-10-27 01:15:28,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:28,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357796897] [2020-10-27 01:15:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:29,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:29,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:29,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:29,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 01:15:29,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:29,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:29,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:29,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:15:29,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:29,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:29,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:29,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:29,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:29,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:29,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:29,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:29,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:29,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:29,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:29,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:29,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357796897] [2020-10-27 01:15:29,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:29,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:29,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131891951] [2020-10-27 01:15:29,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:29,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:29,395 INFO L87 Difference]: Start difference. First operand 92 states and 129 transitions. Second operand 11 states. [2020-10-27 01:15:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:29,883 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2020-10-27 01:15:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:15:29,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 01:15:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:29,886 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:15:29,886 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 01:15:29,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 01:15:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2020-10-27 01:15:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:15:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2020-10-27 01:15:29,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 41 [2020-10-27 01:15:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:29,894 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2020-10-27 01:15:29,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2020-10-27 01:15:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:15:29,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:29,895 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 01:15:29,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:15:29,895 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1041918048, now seen corresponding path program 1 times [2020-10-27 01:15:29,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:29,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180811853] [2020-10-27 01:15:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:30,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:30,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:15:30,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:30,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 01:15:30,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:30,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:30,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:30,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:30,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:30,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:30,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:30,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:30,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:30,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:30,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180811853] [2020-10-27 01:15:30,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:30,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:30,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646102762] [2020-10-27 01:15:30,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:30,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:30,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:30,563 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand 11 states. [2020-10-27 01:15:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:31,004 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2020-10-27 01:15:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:15:31,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 01:15:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:31,006 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:15:31,006 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:15:31,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:15:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:15:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 01:15:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:15:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2020-10-27 01:15:31,019 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 41 [2020-10-27 01:15:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:31,020 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2020-10-27 01:15:31,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2020-10-27 01:15:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:15:31,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:31,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:31,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:15:31,022 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash 799553499, now seen corresponding path program 3 times [2020-10-27 01:15:31,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:31,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416343370] [2020-10-27 01:15:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:31,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:15:31,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:15:31,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:15:31,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:31,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:31,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:31,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:31,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:31,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:31,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:31,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:31,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416343370] [2020-10-27 01:15:31,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:31,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:15:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979072998] [2020-10-27 01:15:31,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:15:31,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:15:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:31,817 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand 12 states. [2020-10-27 01:15:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:32,737 INFO L93 Difference]: Finished difference Result 142 states and 186 transitions. [2020-10-27 01:15:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:15:32,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 01:15:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:32,739 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:15:32,739 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:15:32,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:15:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:15:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2020-10-27 01:15:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:15:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 161 transitions. [2020-10-27 01:15:32,751 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 161 transitions. Word has length 43 [2020-10-27 01:15:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:32,752 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 161 transitions. [2020-10-27 01:15:32,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:15:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 161 transitions. [2020-10-27 01:15:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:15:32,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:32,753 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-27 01:15:32,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:15:32,753 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:32,754 INFO L82 PathProgramCache]: Analyzing trace with hash 76461211, now seen corresponding path program 1 times [2020-10-27 01:15:32,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:32,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976682517] [2020-10-27 01:15:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:15:32,779 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:15:32,779 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:15:32,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:15:32,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:15:32 BoogieIcfgContainer [2020-10-27 01:15:32,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:15:32,816 INFO L168 Benchmark]: Toolchain (without parser) took 15302.70 ms. Allocated memory was 157.3 MB in the beginning and 304.1 MB in the end (delta: 146.8 MB). Free memory was 131.7 MB in the beginning and 106.4 MB in the end (delta: 25.3 MB). Peak memory consumption was 172.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:32,816 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 157.3 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:15:32,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.83 ms. Allocated memory is still 157.3 MB. Free memory was 131.2 MB in the beginning and 108.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:32,819 INFO L168 Benchmark]: Boogie Preprocessor took 79.66 ms. Allocated memory is still 157.3 MB. Free memory was 108.9 MB in the beginning and 105.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:32,829 INFO L168 Benchmark]: RCFGBuilder took 1078.06 ms. Allocated memory is still 157.3 MB. Free memory was 105.5 MB in the beginning and 87.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:32,831 INFO L168 Benchmark]: TraceAbstraction took 13512.83 ms. Allocated memory was 157.3 MB in the beginning and 304.1 MB in the end (delta: 146.8 MB). Free memory was 86.7 MB in the beginning and 106.4 MB in the end (delta: -19.7 MB). Peak memory consumption was 127.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:32,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 157.3 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 614.83 ms. Allocated memory is still 157.3 MB. Free memory was 131.2 MB in the beginning and 108.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.66 ms. Allocated memory is still 157.3 MB. Free memory was 108.9 MB in the beginning and 105.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1078.06 ms. Allocated memory is still 157.3 MB. Free memory was 105.5 MB in the beginning and 87.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13512.83 ms. Allocated memory was 157.3 MB in the beginning and 304.1 MB in the end (delta: 146.8 MB). Free memory was 86.7 MB in the beginning and 106.4 MB in the end (delta: -19.7 MB). Peak memory consumption was 127.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) [L597] List t; [L598] List p = a; [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a [L615] EXPR p->h [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h [L619] COND TRUE p->h != 3 [L620] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_and_tree_cnstr-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.3s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 811 SDtfs, 572 SDslu, 2820 SDs, 0 SdLazy, 2770 SolverSat, 240 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 147 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 548 NumberOfCodeBlocks, 548 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 491 ConstructedInterpolants, 0 QuantifiedInterpolants, 108871 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 22/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...