/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/eca-rers2012/Problem13_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:00:15,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:00:15,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:00:15,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:00:15,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:00:15,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:00:15,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:00:15,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:00:15,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:00:15,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:00:15,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:00:15,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:00:15,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:00:15,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:00:15,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:00:15,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:00:15,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:00:15,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:00:15,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:00:15,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:00:15,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:00:15,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:00:15,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:00:15,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:00:15,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:00:15,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:00:15,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:00:15,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:00:15,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:00:15,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:00:15,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:00:15,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:00:15,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:00:15,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:00:15,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:00:15,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:00:15,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:00:15,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:00:15,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:00:15,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:00:15,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:00:15,886 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 18:00:15,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:00:15,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:00:15,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:00:15,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:00:15,960 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:00:15,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:00:15,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:00:15,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:00:15,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:00:15,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:00:15,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:00:15,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:00:15,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:00:15,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:00:15,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:00:15,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:00:15,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:00:15,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:00:15,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:00:15,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:00:15,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:00:15,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:00:15,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:00:15,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:00:15,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:00:15,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:00:15,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:00:15,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:00:15,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:00:15,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:00:16,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:00:16,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:00:16,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:00:16,543 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:00:16,544 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:00:16,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label27.c [2020-10-27 18:00:16,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c8367488/8f9537a106944310918b4cc41a5319c7/FLAG4e6f84e66 [2020-10-27 18:00:17,794 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:00:17,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label27.c [2020-10-27 18:00:17,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c8367488/8f9537a106944310918b4cc41a5319c7/FLAG4e6f84e66 [2020-10-27 18:00:18,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c8367488/8f9537a106944310918b4cc41a5319c7 [2020-10-27 18:00:18,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:00:18,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:00:18,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:00:18,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:00:18,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:00:18,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:00:18" (1/1) ... [2020-10-27 18:00:18,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@827415e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:18, skipping insertion in model container [2020-10-27 18:00:18,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:00:18" (1/1) ... [2020-10-27 18:00:18,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:00:18,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:00:20,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:00:20,122 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:00:20,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:00:20,997 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:00:20,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20 WrapperNode [2020-10-27 18:00:20,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:00:21,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:00:21,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:00:21,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:00:21,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (1/1) ... [2020-10-27 18:00:21,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:00:21,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:00:21,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:00:21,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:00:21,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (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 18:00:21,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:00:21,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:00:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:00:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:00:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:00:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:00:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:00:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:00:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:00:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:00:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:00:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:00:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:00:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:00:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:00:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:00:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:00:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:00:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:00:21,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:00:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:00:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:00:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:00:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:00:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:00:34,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:00:34,617 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:00:34,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:00:34 BoogieIcfgContainer [2020-10-27 18:00:34,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:00:34,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:00:34,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:00:34,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:00:34,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:00:18" (1/3) ... [2020-10-27 18:00:34,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74796109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:00:34, skipping insertion in model container [2020-10-27 18:00:34,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:00:20" (2/3) ... [2020-10-27 18:00:34,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74796109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:00:34, skipping insertion in model container [2020-10-27 18:00:34,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:00:34" (3/3) ... [2020-10-27 18:00:34,640 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2020-10-27 18:00:34,653 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:00:34,659 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:00:34,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:00:34,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:00:34,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:00:34,715 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:00:34,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:00:34,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:00:34,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:00:34,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:00:34,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:00:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:00:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 18:00:34,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:34,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:00:34,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:34,778 INFO L82 PathProgramCache]: Analyzing trace with hash 416159474, now seen corresponding path program 1 times [2020-10-27 18:00:34,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:34,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441932503] [2020-10-27 18:00:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:35,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:35,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:35,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 18:00:35,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:35,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-27 18:00:35,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:35,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:00:35,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:00:35,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 18:00:35,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:00:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:35,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:35,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:35,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:35,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:35,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 18:00:35,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:00:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:35,871 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 18:00:35,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441932503] [2020-10-27 18:00:35,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:00:35,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:00:35,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924300174] [2020-10-27 18:00:35,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:00:35,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:00:35,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:00:35,910 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:00:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:00:54,651 INFO L93 Difference]: Finished difference Result 3248 states and 5954 transitions. [2020-10-27 18:00:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:00:54,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-27 18:00:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:00:54,702 INFO L225 Difference]: With dead ends: 3248 [2020-10-27 18:00:54,703 INFO L226 Difference]: Without dead ends: 2046 [2020-10-27 18:00:54,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:00:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-27 18:00:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1989. [2020-10-27 18:00:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-10-27 18:00:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 3534 transitions. [2020-10-27 18:00:54,961 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 3534 transitions. Word has length 52 [2020-10-27 18:00:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:00:54,962 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 3534 transitions. [2020-10-27 18:00:54,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:00:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 3534 transitions. [2020-10-27 18:00:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 18:00:54,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:54,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2020-10-27 18:00:54,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:00:54,982 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 695830070, now seen corresponding path program 1 times [2020-10-27 18:00:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:54,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186357167] [2020-10-27 18:00:54,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:55,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:55,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:56,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:56,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 18:00:56,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:00:56,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-27 18:00:56,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:00:56,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:00:56,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:00:57,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:57,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:57,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:57,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:57,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:57,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:00:57,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:57,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:57,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 18:00:57,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:00:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:57,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:57,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:00:57,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 18:00:57,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:00:57,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:00:57,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186357167] [2020-10-27 18:00:57,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:57,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:00:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574016928] [2020-10-27 18:00:57,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:00:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:57,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:00:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:00:57,481 INFO L87 Difference]: Start difference. First operand 1989 states and 3534 transitions. Second operand 5 states. [2020-10-27 18:00:58,117 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:01:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:01:13,571 INFO L93 Difference]: Finished difference Result 3993 states and 7091 transitions. [2020-10-27 18:01:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:01:13,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-27 18:01:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:01:13,594 INFO L225 Difference]: With dead ends: 3993 [2020-10-27 18:01:13,594 INFO L226 Difference]: Without dead ends: 1993 [2020-10-27 18:01:13,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:01:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-10-27 18:01:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1989. [2020-10-27 18:01:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-10-27 18:01:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 3532 transitions. [2020-10-27 18:01:13,689 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 3532 transitions. Word has length 121 [2020-10-27 18:01:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:01:13,689 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 3532 transitions. [2020-10-27 18:01:13,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:01:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 3532 transitions. [2020-10-27 18:01:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 18:01:13,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:01:13,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 18:01:13,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:01:13,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:01:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:01:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash -182329348, now seen corresponding path program 1 times [2020-10-27 18:01:13,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:01:13,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030986210] [2020-10-27 18:01:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:01:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:14,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:14,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:14,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 18:01:14,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:01:14,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-10-27 18:01:14,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:01:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 18:01:14,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:01:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:15,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:01:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:15,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:15,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:15,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:01:15,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:15,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 18:01:15,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:01:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:01:15,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:15,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:01:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:15,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:15,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:01:15,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:15,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 18:01:15,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:15,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:01:15,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:15,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 18:01:15,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:01:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030986210] [2020-10-27 18:01:15,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:01:15,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:01:15,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793637342] [2020-10-27 18:01:15,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:01:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:01:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:01:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:01:15,379 INFO L87 Difference]: Start difference. First operand 1989 states and 3532 transitions. Second operand 5 states. [2020-10-27 18:01:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:01:36,943 INFO L93 Difference]: Finished difference Result 5658 states and 10227 transitions. [2020-10-27 18:01:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:01:36,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-10-27 18:01:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:01:36,974 INFO L225 Difference]: With dead ends: 5658 [2020-10-27 18:01:36,974 INFO L226 Difference]: Without dead ends: 3675 [2020-10-27 18:01:36,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:01:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-10-27 18:01:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3650. [2020-10-27 18:01:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2020-10-27 18:01:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 5564 transitions. [2020-10-27 18:01:37,086 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 5564 transitions. Word has length 124 [2020-10-27 18:01:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:01:37,087 INFO L481 AbstractCegarLoop]: Abstraction has 3650 states and 5564 transitions. [2020-10-27 18:01:37,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:01:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 5564 transitions. [2020-10-27 18:01:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 18:01:37,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:01:37,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:01:37,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:01:37,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:01:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:01:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash 147353901, now seen corresponding path program 1 times [2020-10-27 18:01:37,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:01:37,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2191583] [2020-10-27 18:01:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:01:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:37,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:37,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:37,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 18:01:37,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:01:37,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-27 18:01:37,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:37,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:01:37,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:01:37,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:01:37,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:38,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:01:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:38,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:38,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:38,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:01:38,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:38,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:01:38,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:38,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:01:38,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:38,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:01:38,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:38,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:01:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:38,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:38,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:38,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:01:38,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:38,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 18:01:38,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:38,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:01:38,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:38,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:01:38,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:01:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:01:38,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2191583] [2020-10-27 18:01:38,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:01:38,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:01:38,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567197282] [2020-10-27 18:01:38,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:01:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:01:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:01:38,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:01:38,345 INFO L87 Difference]: Start difference. First operand 3650 states and 5564 transitions. Second operand 5 states. [2020-10-27 18:02:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:00,580 INFO L93 Difference]: Finished difference Result 8951 states and 14290 transitions. [2020-10-27 18:02:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:00,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-27 18:02:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:00,614 INFO L225 Difference]: With dead ends: 8951 [2020-10-27 18:02:00,615 INFO L226 Difference]: Without dead ends: 5307 [2020-10-27 18:02:00,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2020-10-27 18:02:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 5298. [2020-10-27 18:02:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5298 states. [2020-10-27 18:02:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 7620 transitions. [2020-10-27 18:02:00,763 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 7620 transitions. Word has length 128 [2020-10-27 18:02:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:00,764 INFO L481 AbstractCegarLoop]: Abstraction has 5298 states and 7620 transitions. [2020-10-27 18:02:00,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:02:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 7620 transitions. [2020-10-27 18:02:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 18:02:00,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:00,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:00,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:02:00,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1113641019, now seen corresponding path program 1 times [2020-10-27 18:02:00,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:00,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775780892] [2020-10-27 18:02:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:03,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 18:02:03,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:02:03,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2639 [2020-10-27 18:02:03,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 18:02:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 18:02:03,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:03,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:03,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:03,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:03,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:03,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:02:03,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:03,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:03,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:03,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:03,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:03,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:03,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:03,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:03,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 18:02:03,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:03,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 18:02:03,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 18:02:03,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:03,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775780892] [2020-10-27 18:02:03,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:03,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:02:03,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862492903] [2020-10-27 18:02:03,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:02:03,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:02:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:03,902 INFO L87 Difference]: Start difference. First operand 5298 states and 7620 transitions. Second operand 5 states. [2020-10-27 18:02:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:22,881 INFO L93 Difference]: Finished difference Result 12242 states and 18451 transitions. [2020-10-27 18:02:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:22,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2020-10-27 18:02:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:22,919 INFO L225 Difference]: With dead ends: 12242 [2020-10-27 18:02:22,919 INFO L226 Difference]: Without dead ends: 6950 [2020-10-27 18:02:22,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2020-10-27 18:02:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 6936. [2020-10-27 18:02:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6936 states. [2020-10-27 18:02:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 9977 transitions. [2020-10-27 18:02:23,145 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 9977 transitions. Word has length 172 [2020-10-27 18:02:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:23,146 INFO L481 AbstractCegarLoop]: Abstraction has 6936 states and 9977 transitions. [2020-10-27 18:02:23,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:02:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 9977 transitions. [2020-10-27 18:02:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 18:02:23,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:23,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:02:23,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:02:23,152 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:23,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1612227893, now seen corresponding path program 1 times [2020-10-27 18:02:23,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:23,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115649846] [2020-10-27 18:02:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:23,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:23,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:24,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:26,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:28,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:28,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-27 18:02:28,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:02:28,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 18:02:28,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-10-27 18:02:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:02:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:28,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:28,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:28,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:28,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:02:28,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:28,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:28,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:28,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:28,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:02:28,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 18:02:28,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-27 18:02:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:28,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:28,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:28,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 18:02:28,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:28,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 18:02:28,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 18:02:28,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 18:02:28,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115649846] [2020-10-27 18:02:28,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:28,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:02:28,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509608378] [2020-10-27 18:02:28,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:02:28,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:02:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:28,690 INFO L87 Difference]: Start difference. First operand 6936 states and 9977 transitions. Second operand 5 states. [2020-10-27 18:02:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:53,763 INFO L93 Difference]: Finished difference Result 20377 states and 30101 transitions. [2020-10-27 18:02:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:53,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2020-10-27 18:02:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:53,835 INFO L225 Difference]: With dead ends: 20377 [2020-10-27 18:02:53,835 INFO L226 Difference]: Without dead ends: 13447 [2020-10-27 18:02:53,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13447 states. [2020-10-27 18:02:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13447 to 13442. [2020-10-27 18:02:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13442 states. [2020-10-27 18:02:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 18584 transitions. [2020-10-27 18:02:54,245 INFO L78 Accepts]: Start accepts. Automaton has 13442 states and 18584 transitions. Word has length 210 [2020-10-27 18:02:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:54,246 INFO L481 AbstractCegarLoop]: Abstraction has 13442 states and 18584 transitions. [2020-10-27 18:02:54,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:02:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 13442 states and 18584 transitions. [2020-10-27 18:02:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 18:02:54,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:54,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:54,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:02:54,257 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1311826075, now seen corresponding path program 1 times [2020-10-27 18:02:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935653632] [2020-10-27 18:02:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:54,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:56,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:56,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 18:02:56,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:02:56,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-10-27 18:02:56,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-10-27 18:02:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:02:56,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:02:56,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:56,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:56,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:56,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:56,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:02:56,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:56,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:56,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:56,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:56,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:56,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:56,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:56,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 18:02:56,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 18:02:56,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-27 18:02:56,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:56,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935653632] [2020-10-27 18:02:56,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:56,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:02:56,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839064490] [2020-10-27 18:02:56,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:02:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:02:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:56,840 INFO L87 Difference]: Start difference. First operand 13442 states and 18584 transitions. Second operand 5 states. [2020-10-27 18:03:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:25,058 INFO L93 Difference]: Finished difference Result 30145 states and 43351 transitions. [2020-10-27 18:03:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:03:25,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 245 [2020-10-27 18:03:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:25,124 INFO L225 Difference]: With dead ends: 30145 [2020-10-27 18:03:25,124 INFO L226 Difference]: Without dead ends: 16709 [2020-10-27 18:03:25,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:03:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16709 states. [2020-10-27 18:03:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16709 to 16688. [2020-10-27 18:03:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16688 states. [2020-10-27 18:03:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16688 states to 16688 states and 23205 transitions. [2020-10-27 18:03:25,696 INFO L78 Accepts]: Start accepts. Automaton has 16688 states and 23205 transitions. Word has length 245 [2020-10-27 18:03:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:25,697 INFO L481 AbstractCegarLoop]: Abstraction has 16688 states and 23205 transitions. [2020-10-27 18:03:25,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:03:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 16688 states and 23205 transitions. [2020-10-27 18:03:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-27 18:03:25,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:25,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:03:25,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:03:25,709 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1731329311, now seen corresponding path program 1 times [2020-10-27 18:03:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:25,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267371791] [2020-10-27 18:03:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:25,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:26,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:29,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:30,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:30,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-27 18:03:30,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:03:30,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 18:03:30,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-10-27 18:03:30,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 18:03:30,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:03:31,095 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:03:31,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:31,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:31,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:31,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:31,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:31,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:03:31,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:31,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:31,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:31,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:03:31,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 18:03:31,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:31,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:31,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:03:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 18:03:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:31,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:31,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:31,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 18:03:31,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:31,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 18:03:31,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:31,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 18:03:31,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:03:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 18:03:31,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267371791] [2020-10-27 18:03:31,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:31,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:31,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244492568] [2020-10-27 18:03:31,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:31,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:31,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:31,623 INFO L87 Difference]: Start difference. First operand 16688 states and 23205 transitions. Second operand 5 states. [2020-10-27 18:03:32,432 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 18:04:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:06,669 INFO L93 Difference]: Finished difference Result 49631 states and 72154 transitions. [2020-10-27 18:04:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:06,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-10-27 18:04:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:06,831 INFO L225 Difference]: With dead ends: 49631 [2020-10-27 18:04:06,831 INFO L226 Difference]: Without dead ends: 32949 [2020-10-27 18:04:06,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:04:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32949 states. [2020-10-27 18:04:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32949 to 32942. [2020-10-27 18:04:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32942 states. [2020-10-27 18:04:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32942 states to 32942 states and 44959 transitions. [2020-10-27 18:04:07,955 INFO L78 Accepts]: Start accepts. Automaton has 32942 states and 44959 transitions. Word has length 247 [2020-10-27 18:04:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:07,955 INFO L481 AbstractCegarLoop]: Abstraction has 32942 states and 44959 transitions. [2020-10-27 18:04:07,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32942 states and 44959 transitions. [2020-10-27 18:04:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-27 18:04:07,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:07,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:04:07,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:04:07,994 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1201953390, now seen corresponding path program 1 times [2020-10-27 18:04:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:07,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372332911] [2020-10-27 18:04:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:08,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking...