/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-manipulation/tree-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:53:42,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:53:42,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:53:42,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:53:42,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:53:42,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:53:42,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:53:42,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:53:42,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:53:42,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:53:42,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:53:42,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:53:42,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:53:42,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:53:42,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:53:42,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:53:42,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:53:42,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:53:42,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:53:43,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:53:43,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:53:43,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:53:43,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:53:43,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:53:43,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:53:43,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:53:43,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:53:43,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:53:43,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:53:43,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:53:43,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:53:43,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:53:43,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:53:43,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:53:43,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:53:43,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:53:43,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:53:43,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:53:43,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:53:43,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:53:43,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:53:43,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:53:43,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:53:43,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:53:43,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:53:43,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:53:43,089 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:53:43,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:53:43,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:53:43,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:53:43,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:53:43,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:53:43,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:53:43,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:53:43,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:53:43,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:53:43,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:53:43,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:53:43,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:53:43,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:53:43,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:53:43,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:53:43,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:53:43,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:53:43,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:53:43,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:53:43,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:53:43,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:53:43,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:53:43,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:53:43,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:53:43,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:53:43,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:53:43,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:53:43,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:53:43,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:53:43,608 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:53:43,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/tree-3.i [2020-10-27 19:53:43,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09705655e/9ea3d517cdaa4b6f8040214b19dfe386/FLAG0a4c3f0e7 [2020-10-27 19:53:44,460 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:53:44,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-3.i [2020-10-27 19:53:44,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09705655e/9ea3d517cdaa4b6f8040214b19dfe386/FLAG0a4c3f0e7 [2020-10-27 19:53:44,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09705655e/9ea3d517cdaa4b6f8040214b19dfe386 [2020-10-27 19:53:44,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:53:44,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:53:44,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:53:44,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:53:44,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:53:44,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:53:44" (1/1) ... [2020-10-27 19:53:44,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb4f3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:44, skipping insertion in model container [2020-10-27 19:53:44,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:53:44" (1/1) ... [2020-10-27 19:53:44,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:53:44,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:53:45,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:53:45,274 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:53:45,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:53:45,417 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:53:45,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45 WrapperNode [2020-10-27 19:53:45,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:53:45,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:53:45,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:53:45,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:53:45,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... [2020-10-27 19:53:45,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:53:45,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:53:45,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:53:45,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:53:45,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:53:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:53:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:53:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:53:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:53:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:53:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-27 19:53:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-27 19:53:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-27 19:53:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-27 19:53:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:53:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:53:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:53:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:53:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:53:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:53:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:53:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:53:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:53:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:53:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:53:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:53:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:53:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:53:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:53:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:53:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:53:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:53:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:53:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:53:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:53:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:53:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:53:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:53:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:53:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:53:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:53:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:53:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:53:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:53:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:53:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:53:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:53:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:53:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:53:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:53:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:53:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:53:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:53:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:53:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:53:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:53:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:53:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:53:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:53:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:53:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:53:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:53:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:53:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-27 19:53:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-27 19:53:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:53:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:53:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-27 19:53:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:53:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:53:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:53:46,529 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:53:46,529 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 19:53:46,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:53:46 BoogieIcfgContainer [2020-10-27 19:53:46,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:53:46,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:53:46,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:53:46,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:53:46,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:53:44" (1/3) ... [2020-10-27 19:53:46,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1940c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:53:46, skipping insertion in model container [2020-10-27 19:53:46,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:45" (2/3) ... [2020-10-27 19:53:46,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1940c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:53:46, skipping insertion in model container [2020-10-27 19:53:46,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:53:46" (3/3) ... [2020-10-27 19:53:46,546 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-3.i [2020-10-27 19:53:46,558 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:53:46,564 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:53:46,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:53:46,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:53:46,606 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:53:46,606 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:53:46,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:53:46,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:53:46,607 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:53:46,607 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:53:46,607 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:53:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-27 19:53:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:53:46,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:46,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:46,634 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 406033699, now seen corresponding path program 1 times [2020-10-27 19:53:46,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:46,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013499051] [2020-10-27 19:53:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:47,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:47,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:53:47,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:53:47,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-27 19:53:47,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:53:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:53:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:53:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:53:48,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:48,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:48,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:48,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:48,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:48,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:53:48,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:48,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:48,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:48,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:48,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:48,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:48,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:48,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:48,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:48,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:48,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 19:53:48,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:53:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:53:48,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:53:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:48,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:48,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013499051] [2020-10-27 19:53:48,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:53:48,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:53:48,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040548251] [2020-10-27 19:53:48,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:53:48,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:53:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:53:48,226 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 7 states. [2020-10-27 19:53:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:49,390 INFO L93 Difference]: Finished difference Result 155 states and 243 transitions. [2020-10-27 19:53:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:53:49,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 19:53:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:49,402 INFO L225 Difference]: With dead ends: 155 [2020-10-27 19:53:49,402 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 19:53:49,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:53:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 19:53:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2020-10-27 19:53:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 19:53:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-27 19:53:49,455 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 22 [2020-10-27 19:53:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:49,455 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-27 19:53:49,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:53:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-27 19:53:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:53:49,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:49,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:49,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:53:49,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:49,459 INFO L82 PathProgramCache]: Analyzing trace with hash 158858121, now seen corresponding path program 1 times [2020-10-27 19:53:49,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:49,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544731114] [2020-10-27 19:53:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:49,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:49,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:53:49,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:53:49,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-27 19:53:49,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:53:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:53:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:53:49,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:50,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:50,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:50,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:50,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:53:50,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:50,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:50,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:50,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:50,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 19:53:50,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:50,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 19:53:50,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:50,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:53:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:50,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:53:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:50,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544731114] [2020-10-27 19:53:50,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:53:50,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 19:53:50,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232645837] [2020-10-27 19:53:50,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:53:50,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:53:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:53:50,317 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 10 states. [2020-10-27 19:53:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:51,399 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-10-27 19:53:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:53:51,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 19:53:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:51,402 INFO L225 Difference]: With dead ends: 108 [2020-10-27 19:53:51,402 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 19:53:51,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:53:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 19:53:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-27 19:53:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 19:53:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-27 19:53:51,415 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-10-27 19:53:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:51,415 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-27 19:53:51,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:53:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-27 19:53:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:53:51,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:51,417 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] [2020-10-27 19:53:51,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:53:51,418 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash 952740924, now seen corresponding path program 1 times [2020-10-27 19:53:51,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:51,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232165487] [2020-10-27 19:53:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:53,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:53:53,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 19:53:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1746 [2020-10-27 19:53:53,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:53:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:53:53,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:53:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:53,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:53,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:53:53,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:53,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:53,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:53,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:53,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:53,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:53:53,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:53:53,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 19:53:53,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:53:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:53:53,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:53:53,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:53,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232165487] [2020-10-27 19:53:53,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:53:53,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 19:53:53,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298036894] [2020-10-27 19:53:53,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:53:53,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:53,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:53:53,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:53:53,590 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 9 states. [2020-10-27 19:53:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:54,003 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-10-27 19:53:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:53:54,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 19:53:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:54,005 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:53:54,005 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 19:53:54,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:53:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 19:53:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 19:53:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 19:53:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-27 19:53:54,029 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 36 [2020-10-27 19:53:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:54,031 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-27 19:53:54,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:53:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-27 19:53:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:53:54,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:54,034 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:54,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:53:54,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -554767082, now seen corresponding path program 1 times [2020-10-27 19:53:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:54,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141821009] [2020-10-27 19:53:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:54,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:54,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:53:54,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:54,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-27 19:53:54,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:53:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:53:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:53:54,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:54,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:54,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:54,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:54,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:54,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:53:54,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:54,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:54,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:54,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:54,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:54,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:54,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:55,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:55,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:53:55,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:55,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 19:53:55,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:53:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:53:55,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:55,436 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2020-10-27 19:53:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:55,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141821009] [2020-10-27 19:53:55,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:55,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:53:55,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853210351] [2020-10-27 19:53:55,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:53:55,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:55,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:53:55,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:53:55,497 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 14 states. [2020-10-27 19:53:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:56,525 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-27 19:53:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:53:56,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 19:53:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:56,528 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:53:56,528 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 19:53:56,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:53:56,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 19:53:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-27 19:53:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 19:53:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-27 19:53:56,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 39 [2020-10-27 19:53:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:56,542 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-27 19:53:56,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:53:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-27 19:53:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:53:56,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:56,544 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:56,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:53:56,545 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 606550376, now seen corresponding path program 1 times [2020-10-27 19:53:56,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:56,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514132999] [2020-10-27 19:53:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:56,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:56,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:58,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:58,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:53:58,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:53:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-27 19:53:58,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:53:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 19:53:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:53:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:58,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:58,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:58,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:58,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:58,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:53:58,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:58,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:58,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:59,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:59,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:53:59,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:53:59,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-27 19:53:59,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:59,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:53:59,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:59,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:53:59,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:59,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514132999] [2020-10-27 19:53:59,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:59,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:53:59,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350872575] [2020-10-27 19:53:59,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:53:59,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:59,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:53:59,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:53:59,282 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 16 states. [2020-10-27 19:54:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:00,381 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-27 19:54:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:54:00,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 19:54:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:00,385 INFO L225 Difference]: With dead ends: 93 [2020-10-27 19:54:00,385 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 19:54:00,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:54:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 19:54:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2020-10-27 19:54:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:54:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-27 19:54:00,403 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 39 [2020-10-27 19:54:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:00,403 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-27 19:54:00,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:54:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-27 19:54:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:54:00,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:00,405 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, 1] [2020-10-27 19:54:00,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:54:00,405 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:00,406 INFO L82 PathProgramCache]: Analyzing trace with hash 760567351, now seen corresponding path program 1 times [2020-10-27 19:54:00,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:00,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198276895] [2020-10-27 19:54:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:00,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:00,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:54:00,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:00,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-27 19:54:00,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:54:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:54:00,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:54:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:01,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:01,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:01,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:54:01,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:01,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:01,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:01,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:01,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:01,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:54:01,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:01,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 19:54:01,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:01,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:54:01,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:01,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:54:01,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:01,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198276895] [2020-10-27 19:54:01,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:01,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:54:01,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324112076] [2020-10-27 19:54:01,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:54:01,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:54:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:54:01,658 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 15 states. [2020-10-27 19:54:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:02,810 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2020-10-27 19:54:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:54:02,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 19:54:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:02,813 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:54:02,813 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 19:54:02,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:54:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 19:54:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2020-10-27 19:54:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 19:54:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-10-27 19:54:02,850 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 42 [2020-10-27 19:54:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:02,850 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-10-27 19:54:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:54:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-10-27 19:54:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:54:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:02,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:02,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:54:02,855 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1966095162, now seen corresponding path program 2 times [2020-10-27 19:54:02,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:02,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311896573] [2020-10-27 19:54:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:02,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:03,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:03,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:04,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:07,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:07,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:54:07,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:54:07,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-27 19:54:07,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:07,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:54:07,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:54:07,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:54:07,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:08,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:08,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:08,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:08,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:08,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:08,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:54:08,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:08,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:08,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:08,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:08,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:08,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:08,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:08,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:10,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:10,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:54:10,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:54:10,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2041 [2020-10-27 19:54:10,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:10,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:54:10,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 19:54:10,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:54:10,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:10,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311896573] [2020-10-27 19:54:10,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:10,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:54:10,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249058697] [2020-10-27 19:54:10,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:54:10,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:10,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:54:10,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:54:10,421 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 9 states. [2020-10-27 19:54:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:11,065 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2020-10-27 19:54:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:54:11,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-27 19:54:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:11,068 INFO L225 Difference]: With dead ends: 134 [2020-10-27 19:54:11,069 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 19:54:11,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:54:11,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 19:54:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 19:54:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 19:54:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-27 19:54:11,099 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 42 [2020-10-27 19:54:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:11,099 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-27 19:54:11,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:54:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-27 19:54:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:54:11,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:11,105 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, 1] [2020-10-27 19:54:11,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:54:11,106 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2146770745, now seen corresponding path program 1 times [2020-10-27 19:54:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:11,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189280860] [2020-10-27 19:54:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:11,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:11,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:11,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:54:11,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:11,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-27 19:54:11,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:11,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:54:11,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:54:11,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:54:11,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:11,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:11,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:11,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:11,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:11,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:54:11,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:11,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:11,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:11,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:11,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:11,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:11,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:12,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:12,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:54:12,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:12,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 19:54:12,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:54:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:54:12,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:12,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189280860] [2020-10-27 19:54:12,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:12,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:54:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928230703] [2020-10-27 19:54:12,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:54:12,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:54:12,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:54:12,305 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 15 states. [2020-10-27 19:54:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:13,397 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2020-10-27 19:54:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:54:13,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 19:54:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:13,399 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:54:13,399 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 19:54:13,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:54:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 19:54:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 78. [2020-10-27 19:54:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:54:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-27 19:54:13,427 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 42 [2020-10-27 19:54:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:13,427 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-27 19:54:13,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:54:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-27 19:54:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:54:13,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:13,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:13,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:54:13,432 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2064507256, now seen corresponding path program 1 times [2020-10-27 19:54:13,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:13,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902261185] [2020-10-27 19:54:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:15,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:15,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:54:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:15,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:15,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:15,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:54:15,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:15,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:15,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:15,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:54:15,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:54:15,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 19:54:15,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:54:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:54:15,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:15,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902261185] [2020-10-27 19:54:15,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:15,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:54:15,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778443165] [2020-10-27 19:54:15,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:54:15,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:54:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:54:15,998 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 16 states. [2020-10-27 19:54:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:17,173 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-27 19:54:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:54:17,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 19:54:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:17,176 INFO L225 Difference]: With dead ends: 113 [2020-10-27 19:54:17,177 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 19:54:17,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:54:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 19:54:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-27 19:54:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:54:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-27 19:54:17,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 45 [2020-10-27 19:54:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:17,188 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-27 19:54:17,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:54:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-27 19:54:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:54:17,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:17,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:17,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:54:17,190 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:17,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:17,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1583408903, now seen corresponding path program 1 times [2020-10-27 19:54:17,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:17,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504753701] [2020-10-27 19:54:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:17,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:19,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2644 [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:54:19,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:54:19,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:20,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:20,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:20,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:20,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:20,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:54:20,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:20,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:20,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:20,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:20,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:20,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:20,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:20,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:54:20,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:20,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 19:54:20,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:54:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:20,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:54:20,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:23,554 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 324 DAG size of output: 76 [2020-10-27 19:54:23,749 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 18 [2020-10-27 19:54:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:23,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504753701] [2020-10-27 19:54:23,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:23,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:54:23,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458079719] [2020-10-27 19:54:23,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:54:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:23,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:54:23,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:54:23,921 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 18 states. [2020-10-27 19:54:24,386 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-27 19:54:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:25,748 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-10-27 19:54:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:54:25,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-27 19:54:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:25,750 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:54:25,750 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 19:54:25,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:54:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 19:54:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-10-27 19:54:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 19:54:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-27 19:54:25,763 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 48 [2020-10-27 19:54:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:25,763 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-27 19:54:25,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:54:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-27 19:54:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:54:25,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:25,765 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, 1, 1, 1] [2020-10-27 19:54:25,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:54:25,765 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1550240935, now seen corresponding path program 1 times [2020-10-27 19:54:25,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:25,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063116527] [2020-10-27 19:54:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:25,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:25,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:26,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:26,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:27,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:28,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:30,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:30,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:54:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:54:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 19:54:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:54:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:54:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:54:30,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:31,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:31,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:31,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:31,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:31,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:54:31,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:31,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:31,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:31,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:31,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:31,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:31,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:31,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:31,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:54:31,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:31,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 19:54:31,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:31,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:54:31,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:54:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:33,455 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 212 DAG size of output: 57 [2020-10-27 19:54:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:33,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063116527] [2020-10-27 19:54:33,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:33,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:54:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839863277] [2020-10-27 19:54:33,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:54:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:54:33,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:54:33,691 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 18 states. [2020-10-27 19:54:34,061 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-27 19:54:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:35,364 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2020-10-27 19:54:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:54:35,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-27 19:54:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:35,367 INFO L225 Difference]: With dead ends: 105 [2020-10-27 19:54:35,367 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 19:54:35,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:54:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 19:54:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2020-10-27 19:54:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:54:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-27 19:54:35,381 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 48 [2020-10-27 19:54:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:35,383 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-27 19:54:35,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:54:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-27 19:54:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:54:35,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:35,384 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:35,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:54:35,384 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2040027605, now seen corresponding path program 1 times [2020-10-27 19:54:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:35,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955379307] [2020-10-27 19:54:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:35,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:37,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:37,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 19:54:37,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:37,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2503 [2020-10-27 19:54:37,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:37,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:54:37,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:54:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:54:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:38,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:38,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:38,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:38,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:38,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:54:38,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:38,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:38,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:38,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:38,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:38,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:38,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:39,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:39,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:54:39,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:39,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-27 19:54:39,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:54:39,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:39,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:54:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:40,348 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-27 19:54:40,797 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-27 19:54:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:40,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955379307] [2020-10-27 19:54:40,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:40,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:54:40,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203685856] [2020-10-27 19:54:40,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:54:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:54:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:54:40,902 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 20 states. [2020-10-27 19:54:42,113 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-27 19:54:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:43,092 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2020-10-27 19:54:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:54:43,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-27 19:54:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:43,094 INFO L225 Difference]: With dead ends: 160 [2020-10-27 19:54:43,094 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 19:54:43,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:54:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 19:54:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 103. [2020-10-27 19:54:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 19:54:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-10-27 19:54:43,119 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 50 [2020-10-27 19:54:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:43,120 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-10-27 19:54:43,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:54:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-10-27 19:54:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:54:43,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:43,121 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:43,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:54:43,121 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash -878710147, now seen corresponding path program 1 times [2020-10-27 19:54:43,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:43,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394978764] [2020-10-27 19:54:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:43,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:48,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:48,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 19:54:48,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:54:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5294 [2020-10-27 19:54:48,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:54:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 19:54:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:54:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:48,722 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-10-27 19:54:49,022 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-27 19:54:49,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:49,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:49,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:49,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:49,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:54:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:54:49,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:54:50,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394978764] [2020-10-27 19:54:50,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:50,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:54:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314662663] [2020-10-27 19:54:50,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:54:50,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:50,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:54:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:54:50,413 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 16 states. [2020-10-27 19:54:51,358 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 19:54:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:51,628 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2020-10-27 19:54:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:54:51,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-27 19:54:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:51,630 INFO L225 Difference]: With dead ends: 129 [2020-10-27 19:54:51,630 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:54:51,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:54:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:54:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-10-27 19:54:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 19:54:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-10-27 19:54:51,643 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 50 [2020-10-27 19:54:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:51,643 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-10-27 19:54:51,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:54:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-10-27 19:54:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:54:51,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:51,644 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:51,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:54:51,644 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash 117410050, now seen corresponding path program 1 times [2020-10-27 19:54:51,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:51,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516571269] [2020-10-27 19:54:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:53,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:53,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 19:54:53,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-27 19:54:53,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:54:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:54:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:54:53,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:53,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:53,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:53,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:53,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:54:53,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:53,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:53,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:54,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:54:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:54,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:55,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:55,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:54:55,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-27 19:54:55,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:55,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:54:55,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:55,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:54:55,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:55,742 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-27 19:54:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:55,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516571269] [2020-10-27 19:54:55,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:55,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:54:55,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020155844] [2020-10-27 19:54:55,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:54:55,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:54:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:54:55,845 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 21 states. [2020-10-27 19:54:57,065 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-27 19:54:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:58,860 INFO L93 Difference]: Finished difference Result 203 states and 227 transitions. [2020-10-27 19:54:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:54:58,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-27 19:54:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:58,863 INFO L225 Difference]: With dead ends: 203 [2020-10-27 19:54:58,863 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 19:54:58,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:54:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 19:54:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2020-10-27 19:54:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 19:54:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2020-10-27 19:54:58,879 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 53 [2020-10-27 19:54:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:58,879 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2020-10-27 19:54:58,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:54:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2020-10-27 19:54:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:54:58,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:58,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:58,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:54:58,881 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1322937861, now seen corresponding path program 2 times [2020-10-27 19:54:58,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:58,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957547050] [2020-10-27 19:54:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:59,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:00,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:04,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:04,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:55:04,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:04,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:04,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:04,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:04,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:04,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:04,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:04,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:04,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:04,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:04,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:04,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:05,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:05,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:06,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:08,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:08,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:55:08,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:55:08,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3818 [2020-10-27 19:55:08,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:08,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:55:08,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 19:55:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:55:08,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:08,811 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 19:55:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:09,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957547050] [2020-10-27 19:55:09,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:09,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:55:09,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208006504] [2020-10-27 19:55:09,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:55:09,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:55:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:55:09,034 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 15 states. [2020-10-27 19:55:09,972 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 19:55:10,431 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-27 19:55:10,597 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-27 19:55:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:11,174 INFO L93 Difference]: Finished difference Result 196 states and 223 transitions. [2020-10-27 19:55:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:55:11,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-27 19:55:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:11,179 INFO L225 Difference]: With dead ends: 196 [2020-10-27 19:55:11,179 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 19:55:11,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:55:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 19:55:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2020-10-27 19:55:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 19:55:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2020-10-27 19:55:11,193 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 53 [2020-10-27 19:55:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:11,194 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2020-10-27 19:55:11,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:55:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2020-10-27 19:55:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:55:11,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:11,195 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:11,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:55:11,195 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 392169664, now seen corresponding path program 1 times [2020-10-27 19:55:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:11,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257493026] [2020-10-27 19:55:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:12,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:55:12,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:13,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:13,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:13,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:13,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:13,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:55:13,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:13,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:13,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:13,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:13,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:14,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:14,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:55:14,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:14,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-27 19:55:14,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:55:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:55:14,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:15,492 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-27 19:55:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257493026] [2020-10-27 19:55:15,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:15,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:55:15,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783267956] [2020-10-27 19:55:15,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:55:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:55:15,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:55:15,586 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand 21 states. [2020-10-27 19:55:16,650 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-27 19:55:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:18,487 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2020-10-27 19:55:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:55:18,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-27 19:55:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:18,490 INFO L225 Difference]: With dead ends: 225 [2020-10-27 19:55:18,490 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 19:55:18,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:55:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 19:55:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 119. [2020-10-27 19:55:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 19:55:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2020-10-27 19:55:18,505 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 53 [2020-10-27 19:55:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:18,505 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2020-10-27 19:55:18,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:55:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2020-10-27 19:55:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 19:55:18,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:18,506 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:18,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:55:18,506 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1642143063, now seen corresponding path program 1 times [2020-10-27 19:55:18,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:18,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747152956] [2020-10-27 19:55:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:18,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:18,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:18,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:20,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1847 [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:55:20,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:55:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:20,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:20,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:20,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:20,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:20,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:20,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:55:20,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:20,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 19:55:20,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:55:20,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:20,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:55:20,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:22,578 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 341 DAG size of output: 63 [2020-10-27 19:55:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:22,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747152956] [2020-10-27 19:55:22,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:22,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:55:22,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511667061] [2020-10-27 19:55:22,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:55:22,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:55:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:55:22,778 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand 15 states. [2020-10-27 19:55:23,219 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 19:55:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:24,229 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2020-10-27 19:55:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:55:24,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-27 19:55:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:24,232 INFO L225 Difference]: With dead ends: 154 [2020-10-27 19:55:24,232 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 19:55:24,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:55:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 19:55:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 117. [2020-10-27 19:55:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 19:55:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2020-10-27 19:55:24,246 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 54 [2020-10-27 19:55:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:24,246 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2020-10-27 19:55:24,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:55:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2020-10-27 19:55:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 19:55:24,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:24,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:24,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:55:24,248 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash 372935734, now seen corresponding path program 2 times [2020-10-27 19:55:24,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:24,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782681147] [2020-10-27 19:55:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:24,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:24,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:26,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2003 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:55:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:26,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:26,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:26,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:26,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:55:26,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:26,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:26,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:26,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:26,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:26,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:26,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:26,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:26,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:55:26,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:28,836 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 223 DAG size of output: 55 [2020-10-27 19:55:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:29,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782681147] [2020-10-27 19:55:29,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:29,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:55:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088238055] [2020-10-27 19:55:29,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:55:29,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:55:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:55:29,020 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 19 states. [2020-10-27 19:55:30,798 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-27 19:55:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:31,023 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-27 19:55:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:55:31,024 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-27 19:55:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:31,025 INFO L225 Difference]: With dead ends: 139 [2020-10-27 19:55:31,025 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:55:31,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:55:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:55:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-27 19:55:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 19:55:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2020-10-27 19:55:31,040 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 57 [2020-10-27 19:55:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:31,041 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2020-10-27 19:55:31,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:55:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2020-10-27 19:55:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 19:55:31,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:31,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:31,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:55:31,042 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:31,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:31,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1534253192, now seen corresponding path program 2 times [2020-10-27 19:55:31,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:31,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534809710] [2020-10-27 19:55:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:32,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:36,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:36,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 19:55:36,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:55:36,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 19:55:36,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:55:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:55:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:55:36,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:36,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:36,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:36,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:36,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:36,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:36,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:36,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:55:36,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:36,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 19:55:36,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:36,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:55:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:55:36,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:39,490 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 261 DAG size of output: 75 [2020-10-27 19:55:39,761 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2020-10-27 19:55:40,021 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2020-10-27 19:55:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:40,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534809710] [2020-10-27 19:55:40,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:40,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:55:40,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548819811] [2020-10-27 19:55:40,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:55:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:55:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:55:40,047 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand 19 states. [2020-10-27 19:55:40,601 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-27 19:55:41,605 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-27 19:55:41,908 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-27 19:55:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:42,869 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2020-10-27 19:55:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:55:42,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-27 19:55:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:42,873 INFO L225 Difference]: With dead ends: 150 [2020-10-27 19:55:42,873 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 19:55:42,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:55:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 19:55:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-27 19:55:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 19:55:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2020-10-27 19:55:42,892 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 57 [2020-10-27 19:55:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:42,892 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2020-10-27 19:55:42,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:55:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2020-10-27 19:55:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 19:55:42,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:42,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:42,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:55:42,894 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:42,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1162963566, now seen corresponding path program 1 times [2020-10-27 19:55:42,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:42,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142024273] [2020-10-27 19:55:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:43,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:49,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:49,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:55:49,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:55:49,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6068 [2020-10-27 19:55:49,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:55:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:55:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 19:55:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:49,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:49,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:49,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:49,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:49,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:49,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:49,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:50,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:50,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:55:50,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:50,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-27 19:55:50,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:55:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:55:50,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:50,899 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-27 19:55:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:55:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142024273] [2020-10-27 19:55:51,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:55:51,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:55:51,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359299027] [2020-10-27 19:55:51,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:55:51,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:55:51,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:55:51,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:55:51,216 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand 21 states. [2020-10-27 19:55:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:55:53,489 INFO L93 Difference]: Finished difference Result 213 states and 237 transitions. [2020-10-27 19:55:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:55:53,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 19:55:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:55:53,491 INFO L225 Difference]: With dead ends: 213 [2020-10-27 19:55:53,491 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:55:53,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:55:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:55:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-27 19:55:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 19:55:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2020-10-27 19:55:53,506 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 59 [2020-10-27 19:55:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:55:53,506 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2020-10-27 19:55:53,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:55:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2020-10-27 19:55:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 19:55:53,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:55:53,507 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:55:53,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:55:53,508 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:55:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:55:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash -235310476, now seen corresponding path program 3 times [2020-10-27 19:55:53,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:55:53,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775168004] [2020-10-27 19:55:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:55:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 19:55:58,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:55:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 19:55:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:59,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:55:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:59,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:55:59,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:55:59,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:55:59,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:55:59,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:55:59,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:55:59,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:55:59,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:55:59,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:55:59,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:55:59,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:55:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:55:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:04,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:04,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5419 [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:56:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:06,293 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2020-10-27 19:56:06,847 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-27 19:56:07,341 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 62 [2020-10-27 19:56:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:07,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775168004] [2020-10-27 19:56:07,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:07,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:56:07,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119711800] [2020-10-27 19:56:07,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:56:07,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:07,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:56:07,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:56:07,485 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 26 states. [2020-10-27 19:56:07,899 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-27 19:56:08,343 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-10-27 19:56:09,397 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 19:56:10,612 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 19:56:12,174 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 122 DAG size of output: 93 [2020-10-27 19:56:13,406 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-27 19:56:13,800 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2020-10-27 19:56:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:14,317 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-10-27 19:56:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:56:14,318 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-27 19:56:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:14,320 INFO L225 Difference]: With dead ends: 176 [2020-10-27 19:56:14,320 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 19:56:14,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:56:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 19:56:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2020-10-27 19:56:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 19:56:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2020-10-27 19:56:14,338 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 61 [2020-10-27 19:56:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:14,338 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2020-10-27 19:56:14,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:56:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2020-10-27 19:56:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 19:56:14,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:14,339 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:14,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:56:14,339 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:14,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1360661270, now seen corresponding path program 3 times [2020-10-27 19:56:14,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:14,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529496609] [2020-10-27 19:56:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:14,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:14,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:16,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:17,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:17,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:18,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:19,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:19,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 19:56:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:19,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:19,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:19,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:19,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:19,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:56:19,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:19,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:56:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:19,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:20,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:56:20,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:22,251 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 256 DAG size of output: 78 [2020-10-27 19:56:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:22,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529496609] [2020-10-27 19:56:22,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:22,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:56:22,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432716424] [2020-10-27 19:56:22,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:56:22,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:56:22,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:56:22,556 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand 18 states. [2020-10-27 19:56:23,151 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 19:56:23,820 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 19:56:24,375 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 19:56:24,628 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 19:56:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:25,424 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-27 19:56:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:56:25,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-10-27 19:56:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:25,429 INFO L225 Difference]: With dead ends: 166 [2020-10-27 19:56:25,429 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 19:56:25,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:56:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 19:56:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2020-10-27 19:56:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 19:56:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2020-10-27 19:56:25,449 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 63 [2020-10-27 19:56:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:25,449 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2020-10-27 19:56:25,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:56:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2020-10-27 19:56:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 19:56:25,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:25,451 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:25,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:56:25,451 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash 44788761, now seen corresponding path program 2 times [2020-10-27 19:56:25,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:25,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384090985] [2020-10-27 19:56:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:25,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:56:30,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:56:30,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:56:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:30,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:30,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:30,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:30,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:30,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:56:30,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:30,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:30,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:56:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:35,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:35,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:56:35,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4644 [2020-10-27 19:56:35,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:56:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:56:35,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:36,385 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-27 19:56:36,556 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 19:56:36,823 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-27 19:56:37,021 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 19:56:37,190 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-27 19:56:37,642 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-27 19:56:38,392 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2020-10-27 19:56:39,211 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 50 [2020-10-27 19:56:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:39,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384090985] [2020-10-27 19:56:39,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:39,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:56:39,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338972018] [2020-10-27 19:56:39,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:56:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:56:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:56:39,358 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand 28 states. [2020-10-27 19:56:40,796 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-27 19:56:41,045 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 19:56:41,414 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 19:56:41,906 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 19:56:42,450 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-27 19:56:42,731 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-27 19:56:43,679 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-27 19:56:43,911 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-27 19:56:44,564 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 19:56:45,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:56:45,307 INFO L93 Difference]: Finished difference Result 217 states and 243 transitions. [2020-10-27 19:56:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:56:45,311 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-27 19:56:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:56:45,313 INFO L225 Difference]: With dead ends: 217 [2020-10-27 19:56:45,313 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 19:56:45,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:56:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 19:56:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 173. [2020-10-27 19:56:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 19:56:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2020-10-27 19:56:45,334 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 64 [2020-10-27 19:56:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:56:45,334 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2020-10-27 19:56:45,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:56:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2020-10-27 19:56:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 19:56:45,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:56:45,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:56:45,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:56:45,336 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:56:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:56:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1250316572, now seen corresponding path program 4 times [2020-10-27 19:56:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:56:45,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558911118] [2020-10-27 19:56:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:56:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:45,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:50,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:51,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:51,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:56:51,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:51,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5420 [2020-10-27 19:56:51,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:56:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:56:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:56:51,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:56:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:51,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:51,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:56:51,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:56:51,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:56:51,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:51,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:56:51,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:56:51,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:56:51,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:51,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:56:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:56:51,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:54,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:55,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:56:56,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:56:56,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:56:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:56:56,924 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-27 19:56:57,119 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-27 19:56:57,652 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-27 19:56:57,918 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-27 19:56:58,129 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-27 19:56:58,775 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 71 [2020-10-27 19:56:59,111 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-27 19:56:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:56:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558911118] [2020-10-27 19:56:59,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:56:59,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:56:59,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013528359] [2020-10-27 19:56:59,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:56:59,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:56:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:56:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:56:59,411 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand 20 states. [2020-10-27 19:57:00,335 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 19:57:00,944 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-27 19:57:01,431 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 19:57:02,680 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-27 19:57:03,065 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-27 19:57:04,338 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 92 [2020-10-27 19:57:04,630 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 19:57:05,837 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-10-27 19:57:06,764 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 19:57:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:57:07,400 INFO L93 Difference]: Finished difference Result 328 states and 367 transitions. [2020-10-27 19:57:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:57:07,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-27 19:57:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:57:07,403 INFO L225 Difference]: With dead ends: 328 [2020-10-27 19:57:07,403 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 19:57:07,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:57:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 19:57:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2020-10-27 19:57:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-27 19:57:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2020-10-27 19:57:07,427 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 64 [2020-10-27 19:57:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:57:07,427 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2020-10-27 19:57:07,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:57:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2020-10-27 19:57:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 19:57:07,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:57:07,428 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:57:07,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:57:07,428 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:57:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:57:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash -799216741, now seen corresponding path program 2 times [2020-10-27 19:57:07,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:57:07,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629934902] [2020-10-27 19:57:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:57:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:07,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:12,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:12,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:57:12,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:12,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 19:57:12,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:57:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:57:12,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:57:12,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:12,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:57:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:12,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:12,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:57:12,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:12,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:57:12,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:57:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:12,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:57:12,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:57:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:57:12,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:57:17,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:57:17,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:57:17,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:57:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4561 [2020-10-27 19:57:17,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:57:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:57:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:57:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:57:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:57:18,516 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-27 19:57:18,708 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 19:57:19,330 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-27 19:57:20,267 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 66 [2020-10-27 19:57:20,863 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-27 19:57:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:57:21,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629934902] [2020-10-27 19:57:21,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:57:21,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:57:21,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176377505] [2020-10-27 19:57:21,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:57:21,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:57:21,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:57:21,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:57:21,018 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 28 states. [2020-10-27 19:57:22,711 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 19:57:22,970 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-27 19:57:23,238 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 19:57:23,670 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 19:57:23,890 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 19:57:24,269 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-27 19:57:24,534 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54