/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-data/packet_filter.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:33:48,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:33:48,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:33:48,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:33:48,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:33:48,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:33:48,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:33:48,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:33:48,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:33:48,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:33:48,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:33:48,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:33:48,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:33:48,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:33:48,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:33:48,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:33:48,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:33:48,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:33:48,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:33:48,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:33:48,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:33:48,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:33:48,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:33:48,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:33:48,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:33:48,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:33:48,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:33:48,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:33:48,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:33:48,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:33:48,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:33:48,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:33:48,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:33:48,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:33:48,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:33:48,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:33:48,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:33:48,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:33:48,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:33:48,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:33:48,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:33:48,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:33:48,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:33:48,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:33:48,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:33:48,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:33:48,441 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:33:48,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:33:48,441 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:33:48,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:33:48,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:33:48,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:33:48,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:33:48,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:33:48,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:33:48,444 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:33:48,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:33:48,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:33:48,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:33:48,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:33:48,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:33:48,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:33:48,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:33:48,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:48,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:33:48,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:33:48,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:33:48,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:33:48,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:33:48,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:33:48,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:33:48,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:33:48,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:33:48,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:33:48,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:33:48,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:33:48,929 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:33:48,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/packet_filter.i [2020-10-28 14:33:49,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f67438f31/fd9628dea4d340fcbb46653e513a29e6/FLAG38d560b04 [2020-10-28 14:33:49,856 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:33:49,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/packet_filter.i [2020-10-28 14:33:49,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f67438f31/fd9628dea4d340fcbb46653e513a29e6/FLAG38d560b04 [2020-10-28 14:33:50,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f67438f31/fd9628dea4d340fcbb46653e513a29e6 [2020-10-28 14:33:50,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:33:50,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:33:50,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:50,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:33:50,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:33:50,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229ade4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50, skipping insertion in model container [2020-10-28 14:33:50,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:33:50,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:33:50,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:50,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:33:50,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:33:50,729 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:33:50,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50 WrapperNode [2020-10-28 14:33:50,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:33:50,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:33:50,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:33:50,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:33:50,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... [2020-10-28 14:33:50,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:33:50,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:33:50,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:33:50,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:33:50,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:33:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:33:50,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:33:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:33:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:33:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:33:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure receive [2020-10-28 14:33:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2020-10-28 14:33:50,920 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2020-10-28 14:33:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure process_prio_queue [2020-10-28 14:33:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure process_normal_queue [2020-10-28 14:33:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:33:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 14:33:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:33:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2020-10-28 14:33:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:33:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:33:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:33:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:33:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:33:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:33:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:33:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:33:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:33:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:33:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:33:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:33:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:33:50,925 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:33:50,926 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:33:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:33:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:33:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:33:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:33:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:33:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:33:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:33:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:33:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:33:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:33:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:33:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:33:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:33:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:33:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:33:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:33:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:33:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:33:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:33:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:33:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:33:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:33:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:33:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:33:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:33:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:33:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:33:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:33:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:33:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:33:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:33:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:33:50,934 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:33:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:33:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:33:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:33:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:33:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:33:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:33:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:33:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:33:50,938 INFO L130 BoogieDeclarations]: Found specification of procedure receive [2020-10-28 14:33:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:33:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:33:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:33:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:33:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:33:50,939 INFO L130 BoogieDeclarations]: Found specification of procedure send [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure process_prio_queue [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure process_normal_queue [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-28 14:33:50,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:33:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:33:50,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:33:51,764 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:33:51,764 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 14:33:51,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:51 BoogieIcfgContainer [2020-10-28 14:33:51,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:33:51,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:33:51,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:33:51,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:33:51,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:33:50" (1/3) ... [2020-10-28 14:33:51,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd4a68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:51, skipping insertion in model container [2020-10-28 14:33:51,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:33:50" (2/3) ... [2020-10-28 14:33:51,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd4a68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:33:51, skipping insertion in model container [2020-10-28 14:33:51,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:33:51" (3/3) ... [2020-10-28 14:33:51,777 INFO L111 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2020-10-28 14:33:51,789 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:33:51,795 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:33:51,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:33:51,840 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:33:51,841 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:33:51,841 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:33:51,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:33:51,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:33:51,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:33:51,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:33:51,842 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:33:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-28 14:33:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:33:51,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:51,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:51,871 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1968323298, now seen corresponding path program 1 times [2020-10-28 14:33:51,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:51,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812066912] [2020-10-28 14:33:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:33:52,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:52,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-28 14:33:52,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:52,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:33:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:33:52,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:52,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:52,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:52,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:52,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:33:52,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:52,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:52,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:52,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812066912] [2020-10-28 14:33:52,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:52,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:33:52,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791620091] [2020-10-28 14:33:52,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:33:52,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:33:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:52,863 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 3 states. [2020-10-28 14:33:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:53,159 INFO L93 Difference]: Finished difference Result 120 states and 163 transitions. [2020-10-28 14:33:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:33:53,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 14:33:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:53,173 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:33:53,174 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:33:53,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:33:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:33:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-28 14:33:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:33:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-28 14:33:53,234 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 16 [2020-10-28 14:33:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:53,234 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-28 14:33:53,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:33:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-28 14:33:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 14:33:53,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:53,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:53,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:33:53,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2089891282, now seen corresponding path program 1 times [2020-10-28 14:33:53,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:53,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152379872] [2020-10-28 14:33:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:53,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:33:53,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-28 14:33:53,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:33:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:53,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:33:53,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:53,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:53,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:33:53,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:53,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:33:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:53,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152379872] [2020-10-28 14:33:53,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:53,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:33:53,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865636753] [2020-10-28 14:33:53,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:33:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:33:53,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:33:53,590 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 7 states. [2020-10-28 14:33:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:54,133 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2020-10-28 14:33:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:33:54,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-28 14:33:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:54,136 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:33:54,136 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 14:33:54,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 14:33:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2020-10-28 14:33:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 14:33:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-28 14:33:54,153 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 17 [2020-10-28 14:33:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:54,153 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-28 14:33:54,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:33:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-28 14:33:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:33:54,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:54,155 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] [2020-10-28 14:33:54,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:33:54,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash 168583672, now seen corresponding path program 1 times [2020-10-28 14:33:54,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:54,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152665467] [2020-10-28 14:33:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:33:54,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-28 14:33:54,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:33:54,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:54,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:33:54,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:54,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:54,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:54,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:54,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:54,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:54,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:33:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:33:54,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 14:33:54,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:33:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:33:54,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:33:54,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:54,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152665467] [2020-10-28 14:33:54,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:33:54,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:33:54,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932618757] [2020-10-28 14:33:54,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:33:54,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:33:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:33:54,580 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 9 states. [2020-10-28 14:33:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:55,212 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-28 14:33:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:33:55,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-28 14:33:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:55,215 INFO L225 Difference]: With dead ends: 99 [2020-10-28 14:33:55,215 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:33:55,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:33:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-10-28 14:33:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:33:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-28 14:33:55,227 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 23 [2020-10-28 14:33:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:55,227 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-28 14:33:55,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:33:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-28 14:33:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:33:55,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:55,229 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] [2020-10-28 14:33:55,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:33:55,229 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash 734135223, now seen corresponding path program 1 times [2020-10-28 14:33:55,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:55,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118618432] [2020-10-28 14:33:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:55,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:33:55,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:55,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-28 14:33:55,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:55,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:55,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:33:55,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:55,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:55,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:55,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:55,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:33:55,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:55,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:55,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:55,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:55,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:55,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:33:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:55,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:33:55,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:55,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 14:33:55,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:55,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:33:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:33:55,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:33:55,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:56,113 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-28 14:33:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:56,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118618432] [2020-10-28 14:33:56,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:56,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:56,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129762355] [2020-10-28 14:33:56,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:56,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:56,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:56,124 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 11 states. [2020-10-28 14:33:56,394 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 14:33:57,575 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-28 14:33:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:58,128 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2020-10-28 14:33:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:33:58,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 14:33:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:58,131 INFO L225 Difference]: With dead ends: 139 [2020-10-28 14:33:58,131 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 14:33:58,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:33:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 14:33:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 72. [2020-10-28 14:33:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:33:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-10-28 14:33:58,152 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 28 [2020-10-28 14:33:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:58,152 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-10-28 14:33:58,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-10-28 14:33:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:33:58,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:58,157 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] [2020-10-28 14:33:58,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:33:58,158 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2029962394, now seen corresponding path program 1 times [2020-10-28 14:33:58,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050537505] [2020-10-28 14:33:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:34:00,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:00,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2202 [2020-10-28 14:34:00,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:34:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:00,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:00,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:00,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:00,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:00,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:00,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:34:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:34:00,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:00,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 14:34:00,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:34:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:34:00,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:00,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 14:34:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:00,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:00,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:00,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 14:34:00,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:00,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:00,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:34:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:00,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050537505] [2020-10-28 14:34:00,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:00,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:00,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787014858] [2020-10-28 14:34:00,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:00,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:00,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:00,919 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 16 states. [2020-10-28 14:34:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,399 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2020-10-28 14:34:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:34:02,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-28 14:34:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,406 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:34:02,406 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:34:02,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:34:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:34:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-28 14:34:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 14:34:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2020-10-28 14:34:02,426 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 34 [2020-10-28 14:34:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,427 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2020-10-28 14:34:02,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2020-10-28 14:34:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:02,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,429 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] [2020-10-28 14:34:02,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:34:02,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2055639233, now seen corresponding path program 1 times [2020-10-28 14:34:02,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145784646] [2020-10-28 14:34:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:02,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:34:02,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-28 14:34:02,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:02,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:34:02,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:03,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:03,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:03,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:03,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:03,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:34:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:34:03,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:03,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 14:34:03,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:03,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:34:03,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:34:03,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:34:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 14:34:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:34:03,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:34:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:34:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:34:03,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145784646] [2020-10-28 14:34:03,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:03,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:03,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732125634] [2020-10-28 14:34:03,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:03,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:03,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:03,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:03,414 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand 12 states. [2020-10-28 14:34:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:04,695 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2020-10-28 14:34:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:34:04,696 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-28 14:34:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:04,698 INFO L225 Difference]: With dead ends: 153 [2020-10-28 14:34:04,698 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:34:04,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:34:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:34:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2020-10-28 14:34:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:34:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-28 14:34:04,725 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 34 [2020-10-28 14:34:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:04,725 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-28 14:34:04,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-28 14:34:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:34:04,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:04,733 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] [2020-10-28 14:34:04,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:34:04,734 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:04,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1895948888, now seen corresponding path program 1 times [2020-10-28 14:34:04,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:04,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153097599] [2020-10-28 14:34:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:04,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:34:07,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:07,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3116 [2020-10-28 14:34:07,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:07,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:34:07,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:34:07,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:07,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:07,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:34:07,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:07,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:34:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:08,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:34:08,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:08,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:34:08,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:08,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:34:08,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:08,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 14:34:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:08,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:08,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:08,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:34:08,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:08,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:34:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:08,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153097599] [2020-10-28 14:34:08,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:08,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:34:08,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980959527] [2020-10-28 14:34:08,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:34:08,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:34:08,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:08,100 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 9 states. [2020-10-28 14:34:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:08,746 INFO L93 Difference]: Finished difference Result 179 states and 229 transitions. [2020-10-28 14:34:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:34:08,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:34:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:08,749 INFO L225 Difference]: With dead ends: 179 [2020-10-28 14:34:08,749 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:34:08,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:34:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-10-28 14:34:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 14:34:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-28 14:34:08,765 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 34 [2020-10-28 14:34:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:08,765 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-28 14:34:08,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:34:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-28 14:34:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:08,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:08,767 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] [2020-10-28 14:34:08,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:34:08,767 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:08,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:08,768 INFO L82 PathProgramCache]: Analyzing trace with hash -836392097, now seen corresponding path program 1 times [2020-10-28 14:34:08,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:08,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179411112] [2020-10-28 14:34:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:08,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:13,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:13,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:34:13,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:34:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:34:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:34:13,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:13,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:13,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:13,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:13,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:13,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:34:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:34:13,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 14:34:13,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:13,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:34:13,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:34:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:14,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:14,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:34:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179411112] [2020-10-28 14:34:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:34:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:34:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330901459] [2020-10-28 14:34:14,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:34:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:34:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:34:14,022 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 9 states. [2020-10-28 14:34:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:14,573 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2020-10-28 14:34:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:34:14,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-28 14:34:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:14,574 INFO L225 Difference]: With dead ends: 174 [2020-10-28 14:34:14,575 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 14:34:14,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:34:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 14:34:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2020-10-28 14:34:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 14:34:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2020-10-28 14:34:14,608 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 35 [2020-10-28 14:34:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:14,608 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2020-10-28 14:34:14,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:34:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2020-10-28 14:34:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:14,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:14,610 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] [2020-10-28 14:34:14,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:34:14,610 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash -976940707, now seen corresponding path program 1 times [2020-10-28 14:34:14,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:14,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114975700] [2020-10-28 14:34:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:14,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:15,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:15,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:15,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-28 14:34:15,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:15,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:34:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:15,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:15,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:15,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:15,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:34:15,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:15,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:15,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:15,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:15,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:34:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:15,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:34:15,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:34:15,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:15,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:34:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:15,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:34:15,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:15,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:34:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:34:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:34:15,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:15,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114975700] [2020-10-28 14:34:15,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:15,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:15,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175420406] [2020-10-28 14:34:15,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:15,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:15,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:15,656 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 13 states. [2020-10-28 14:34:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:16,856 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2020-10-28 14:34:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:34:16,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:34:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:16,862 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:34:16,862 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 14:34:16,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:34:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 14:34:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-28 14:34:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:34:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2020-10-28 14:34:16,895 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 35 [2020-10-28 14:34:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-10-28 14:34:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2020-10-28 14:34:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:34:16,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:16,897 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] [2020-10-28 14:34:16,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:34:16,897 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash -148372707, now seen corresponding path program 1 times [2020-10-28 14:34:16,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:16,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229934922] [2020-10-28 14:34:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:17,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:17,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:34:17,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:17,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:17,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:17,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:17,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:34:17,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:17,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:17,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:17,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:17,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:34:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:17,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:17,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:17,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:34:17,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:17,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 14:34:17,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:17,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:17,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:34:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:34:17,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:18,296 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-28 14:34:18,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:34:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:18,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:18,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:18,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:18,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:18,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 14:34:18,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:18,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:34:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:34:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:34:18,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:29,780 WARN L193 SmtUtils]: Spent 10.07 s on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 14:34:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:29,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229934922] [2020-10-28 14:34:29,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:29,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:29,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602967173] [2020-10-28 14:34:29,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:29,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:29,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:29,800 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 12 states. [2020-10-28 14:34:47,774 WARN L193 SmtUtils]: Spent 17.47 s on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 14:34:56,492 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-28 14:35:24,887 WARN L193 SmtUtils]: Spent 18.78 s on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 14:35:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:52,716 INFO L93 Difference]: Finished difference Result 195 states and 256 transitions. [2020-10-28 14:35:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:35:52,726 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:35:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:52,729 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:35:52,729 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 14:35:52,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:35:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 14:35:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 111. [2020-10-28 14:35:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 14:35:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2020-10-28 14:35:52,747 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 35 [2020-10-28 14:35:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:52,747 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2020-10-28 14:35:52,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:35:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2020-10-28 14:35:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:35:52,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:52,749 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:52,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:35:52,749 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -895284944, now seen corresponding path program 1 times [2020-10-28 14:35:52,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:52,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673108500] [2020-10-28 14:35:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:35:55,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:55,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2460 [2020-10-28 14:35:55,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:35:55,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:35:55,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:35:55,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:55,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:55,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:55,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:55,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:55,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:35:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:35:55,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:55,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:35:55,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:55,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 14:35:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:55,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:55,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:55,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:35:55,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:35:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:55,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:35:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 14:35:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:55,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:55,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:55,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:35:55,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:35:55,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:55,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:35:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:35:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:35:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:55,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673108500] [2020-10-28 14:35:55,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:35:55,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 14:35:55,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415011479] [2020-10-28 14:35:55,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:35:55,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:35:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:35:55,577 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand 9 states. [2020-10-28 14:35:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:56,871 INFO L93 Difference]: Finished difference Result 144 states and 180 transitions. [2020-10-28 14:35:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:35:56,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-28 14:35:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:56,877 INFO L225 Difference]: With dead ends: 144 [2020-10-28 14:35:56,877 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 14:35:56,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:35:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 14:35:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-10-28 14:35:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:35:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2020-10-28 14:35:56,901 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 40 [2020-10-28 14:35:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:56,902 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2020-10-28 14:35:56,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:35:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2020-10-28 14:35:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:35:56,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:56,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:56,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:35:56,906 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash -848123250, now seen corresponding path program 2 times [2020-10-28 14:35:56,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:56,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152369761] [2020-10-28 14:35:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:56,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:57,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:35:57,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:57,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:57,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:57,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:57,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:57,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:57,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:57,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:57,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:57,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:35:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:57,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:57,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:57,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:35:57,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:57,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 14:35:57,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:57,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:35:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:35:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:35:57,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:58,183 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-28 14:35:58,950 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-28 14:35:58,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 14:35:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:59,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:59,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:35:59,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 14:35:59,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:59,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:35:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:35:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:35:59,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:59,631 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-28 14:35:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:35:59,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152369761] [2020-10-28 14:35:59,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:59,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:35:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500996608] [2020-10-28 14:35:59,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:35:59,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:59,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:35:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:59,649 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand 14 states. [2020-10-28 14:36:00,187 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 14:36:00,638 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:36:01,477 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-28 14:36:03,536 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-28 14:36:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:05,977 INFO L93 Difference]: Finished difference Result 188 states and 243 transitions. [2020-10-28 14:36:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:36:05,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-28 14:36:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:05,984 INFO L225 Difference]: With dead ends: 188 [2020-10-28 14:36:05,984 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 14:36:05,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:36:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 14:36:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 115. [2020-10-28 14:36:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 14:36:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2020-10-28 14:36:06,000 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 39 [2020-10-28 14:36:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:06,001 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2020-10-28 14:36:06,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2020-10-28 14:36:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:36:06,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:06,002 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:06,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:36:06,002 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash -823333977, now seen corresponding path program 1 times [2020-10-28 14:36:06,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:06,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374783887] [2020-10-28 14:36:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:06,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:06,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:06,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:06,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 869 [2020-10-28 14:36:06,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:06,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:06,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:36:06,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:06,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:36:06,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:07,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:07,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:36:07,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:36:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:07,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:36:07,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:36:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:07,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:36:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:36:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 14:36:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:07,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:07,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:36:07,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:36:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:36:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:07,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374783887] [2020-10-28 14:36:07,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:07,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:36:07,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893641060] [2020-10-28 14:36:07,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:36:07,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:36:07,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:36:07,676 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand 14 states. [2020-10-28 14:36:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:10,744 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2020-10-28 14:36:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:36:10,747 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:36:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:10,750 INFO L225 Difference]: With dead ends: 149 [2020-10-28 14:36:10,750 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 14:36:10,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:36:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 14:36:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 128. [2020-10-28 14:36:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 14:36:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 163 transitions. [2020-10-28 14:36:10,767 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 163 transitions. Word has length 41 [2020-10-28 14:36:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:10,768 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 163 transitions. [2020-10-28 14:36:10,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:36:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 163 transitions. [2020-10-28 14:36:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:36:10,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:10,769 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:36:10,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:36:10,769 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash -821486935, now seen corresponding path program 1 times [2020-10-28 14:36:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:10,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227320573] [2020-10-28 14:36:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:10,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:11,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:12,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1378 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:36:12,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:12,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:12,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:12,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:12,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:12,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:36:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:12,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:36:12,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:12,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:36:12,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:12,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:36:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:36:12,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:12,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:36:12,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:13,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 14:36:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:13,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:13,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:36:13,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:36:13,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:13,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:36:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:36:13,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:36:13,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:36:13,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227320573] [2020-10-28 14:36:13,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:36:13,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:36:13,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058783285] [2020-10-28 14:36:13,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:36:13,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:36:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:36:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:36:13,130 INFO L87 Difference]: Start difference. First operand 128 states and 163 transitions. Second operand 17 states. [2020-10-28 14:36:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:36:15,941 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-10-28 14:36:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:36:15,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-28 14:36:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:36:15,947 INFO L225 Difference]: With dead ends: 160 [2020-10-28 14:36:15,947 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 14:36:15,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:36:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 14:36:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2020-10-28 14:36:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-28 14:36:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2020-10-28 14:36:15,965 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 41 [2020-10-28 14:36:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:36:15,966 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2020-10-28 14:36:15,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:36:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2020-10-28 14:36:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:36:15,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:36:15,967 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, 1, 1] [2020-10-28 14:36:15,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:36:15,967 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:36:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:36:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1254636218, now seen corresponding path program 1 times [2020-10-28 14:36:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:36:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717211641] [2020-10-28 14:36:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:36:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:16,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:18,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:18,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:36:18,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:36:18,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2870 [2020-10-28 14:36:18,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:18,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:36:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:36:18,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 14:36:18,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:19,434 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-28 14:36:19,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:36:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:19,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:19,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:36:19,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:19,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:36:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:36:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:36:19,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:19,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:36:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:19,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:19,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:19,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:36:19,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:19,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 14:36:19,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:19,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:19,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:36:19,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:36:19,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:36:19,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:36:20,755 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 14:36:20,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 14:36:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:36:20,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:36:20,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:36:20,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:36:20,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:36:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0