/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:06:49,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:06:49,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:06:49,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:06:49,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:06:49,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:06:49,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:06:49,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:06:49,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:06:49,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:06:49,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:06:49,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:06:49,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:06:49,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:06:49,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:06:49,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:06:49,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:06:49,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:06:49,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:06:49,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:06:49,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:06:49,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:06:49,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:06:49,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:06:49,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:06:49,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:06:49,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:06:49,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:06:49,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:06:49,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:06:49,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:06:49,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:06:49,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:06:49,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:06:49,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:06:49,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:06:49,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:06:49,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:06:49,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:06:49,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:06:49,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:06:49,892 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 [2020-10-26 23:06:49,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:06:49,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:06:49,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:06:49,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:06:49,959 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:06:49,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:06:49,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:06:49,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:06:49,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:06:49,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:06:49,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:06:49,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:06:49,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:06:49,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:06:49,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:06:49,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:06:49,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:06:49,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:06:49,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:06:49,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:06:49,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:06:49,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:06:49,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:06:49,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:06:49,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:06:49,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:06:49,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:06:49,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:06:49,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:06:49,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:06:50,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:06:50,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:06:50,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:06:50,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:06:50,462 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:06:50,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label16.c [2020-10-26 23:06:50,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df0295dfe/5551e7307874443b96a495b51074fc20/FLAG2fbf80bd3 [2020-10-26 23:06:51,580 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:06:51,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label16.c [2020-10-26 23:06:51,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df0295dfe/5551e7307874443b96a495b51074fc20/FLAG2fbf80bd3 [2020-10-26 23:06:52,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df0295dfe/5551e7307874443b96a495b51074fc20 [2020-10-26 23:06:52,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:06:52,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:06:52,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:06:52,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:06:52,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:06:52,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:06:52" (1/1) ... [2020-10-26 23:06:52,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3563ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:52, skipping insertion in model container [2020-10-26 23:06:52,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:06:52" (1/1) ... [2020-10-26 23:06:52,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:06:52,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:06:53,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:06:53,912 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:06:54,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:06:54,795 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:06:54,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54 WrapperNode [2020-10-26 23:06:54,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:06:54,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:06:54,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:06:54,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:06:54,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:54,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:54,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:54,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:55,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:55,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:55,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (1/1) ... [2020-10-26 23:06:55,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:06:55,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:06:55,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:06:55,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:06:55,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (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 [2020-10-26 23:06:55,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:06:55,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:06:55,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:06:55,492 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:06:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:06:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:06:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:06:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:06:55,493 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:06:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:06:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:06:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:06:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:06:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:06:55,494 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:07:04,519 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:07:04,520 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:07:04,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:04 BoogieIcfgContainer [2020-10-26 23:07:04,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:07:04,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:07:04,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:07:04,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:07:04,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:06:52" (1/3) ... [2020-10-26 23:07:04,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644a65a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:07:04, skipping insertion in model container [2020-10-26 23:07:04,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:54" (2/3) ... [2020-10-26 23:07:04,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644a65a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:07:04, skipping insertion in model container [2020-10-26 23:07:04,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:07:04" (3/3) ... [2020-10-26 23:07:04,535 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2020-10-26 23:07:04,547 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:07:04,553 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:07:04,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:07:04,600 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:07:04,600 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:07:04,600 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:07:04,600 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:07:04,600 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:07:04,601 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:07:04,601 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:07:04,601 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:07:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:07:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 23:07:04,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:04,654 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] [2020-10-26 23:07:04,655 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1797343030, now seen corresponding path program 1 times [2020-10-26 23:07:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:04,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350717412] [2020-10-26 23:07:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:04,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:05,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:05,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 23:07:05,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:05,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-26 23:07:05,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:05,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:07:05,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:05,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 23:07:05,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:07:05,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:05,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:05,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:05,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:05,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 23:07:05,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:05,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:07:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:07:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350717412] [2020-10-26 23:07:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:07:05,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:07:05,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343750107] [2020-10-26 23:07:05,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:07:05,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:07:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:07:05,620 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:07:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:19,257 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-26 23:07:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:07:19,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 23:07:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:19,295 INFO L225 Difference]: With dead ends: 3123 [2020-10-26 23:07:19,295 INFO L226 Difference]: Without dead ends: 1936 [2020-10-26 23:07:19,308 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 [2020-10-26 23:07:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-26 23:07:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-26 23:07:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-26 23:07:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-26 23:07:19,501 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 29 [2020-10-26 23:07:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:19,502 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-26 23:07:19,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:07:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-26 23:07:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 23:07:19,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:19,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:07:19,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:07:19,513 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:19,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:19,515 INFO L82 PathProgramCache]: Analyzing trace with hash -390492016, now seen corresponding path program 1 times [2020-10-26 23:07:19,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:19,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462860661] [2020-10-26 23:07:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:20,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:20,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:21,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:21,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 23:07:21,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:07:21,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1728 [2020-10-26 23:07:21,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:07:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 23:07:21,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:07:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:21,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:21,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:21,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:21,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:07:21,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:21,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:21,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:21,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:21,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 23:07:21,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:21,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:21,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:21,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:07:21,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:21,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 23:07:21,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:07:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:07:21,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462860661] [2020-10-26 23:07:21,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:07:21,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:07:21,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994880380] [2020-10-26 23:07:21,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:07:21,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:07:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:07:21,847 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 7 states. [2020-10-26 23:07:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:46,023 INFO L93 Difference]: Finished difference Result 5717 states and 8808 transitions. [2020-10-26 23:07:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:07:46,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 105 [2020-10-26 23:07:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:46,051 INFO L225 Difference]: With dead ends: 5717 [2020-10-26 23:07:46,052 INFO L226 Difference]: Without dead ends: 3805 [2020-10-26 23:07:46,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:07:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2020-10-26 23:07:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 3731. [2020-10-26 23:07:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-10-26 23:07:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5301 transitions. [2020-10-26 23:07:46,199 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5301 transitions. Word has length 105 [2020-10-26 23:07:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:46,200 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5301 transitions. [2020-10-26 23:07:46,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:07:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5301 transitions. [2020-10-26 23:07:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 23:07:46,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:46,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:07:46,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:07:46,212 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2023380617, now seen corresponding path program 1 times [2020-10-26 23:07:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:46,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788580304] [2020-10-26 23:07:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:46,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:46,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:48,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:48,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 23:07:48,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:07:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2005 [2020-10-26 23:07:48,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:07:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-26 23:07:48,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:48,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:48,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:48,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:48,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:07:48,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:48,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:48,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:48,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:48,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:48,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:48,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:48,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:07:48,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:07:48,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-26 23:07:48,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 23:07:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:07:49,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788580304] [2020-10-26 23:07:49,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:07:49,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:07:49,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468420804] [2020-10-26 23:07:49,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:07:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:07:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:07:49,051 INFO L87 Difference]: Start difference. First operand 3731 states and 5301 transitions. Second operand 7 states. [2020-10-26 23:08:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:14,293 INFO L93 Difference]: Finished difference Result 11113 states and 16216 transitions. [2020-10-26 23:08:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:08:14,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2020-10-26 23:08:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:14,344 INFO L225 Difference]: With dead ends: 11113 [2020-10-26 23:08:14,344 INFO L226 Difference]: Without dead ends: 7388 [2020-10-26 23:08:14,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:08:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2020-10-26 23:08:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 7260. [2020-10-26 23:08:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7260 states. [2020-10-26 23:08:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7260 states to 7260 states and 10165 transitions. [2020-10-26 23:08:14,605 INFO L78 Accepts]: Start accepts. Automaton has 7260 states and 10165 transitions. Word has length 147 [2020-10-26 23:08:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:14,608 INFO L481 AbstractCegarLoop]: Abstraction has 7260 states and 10165 transitions. [2020-10-26 23:08:14,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:08:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7260 states and 10165 transitions. [2020-10-26 23:08:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 23:08:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:14,618 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, 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, 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] [2020-10-26 23:08:14,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:08:14,618 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1036328929, now seen corresponding path program 1 times [2020-10-26 23:08:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:14,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403643835] [2020-10-26 23:08:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:15,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:19,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:19,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 23:08:19,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:08:19,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4510 [2020-10-26 23:08:19,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:19,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:19,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:19,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:08:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:19,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:19,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:19,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:19,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:19,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:08:19,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:19,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:19,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:19,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:19,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:08:19,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:19,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 23:08:19,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:19,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:19,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:19,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:08:19,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:19,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 23:08:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:19,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:19,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:19,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:08:19,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:19,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 23:08:19,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:08:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-26 23:08:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:08:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 42 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:08:19,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403643835] [2020-10-26 23:08:19,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:08:19,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:08:19,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156159523] [2020-10-26 23:08:19,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:19,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:19,770 INFO L87 Difference]: Start difference. First operand 7260 states and 10165 transitions. Second operand 7 states. [2020-10-26 23:08:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:40,398 INFO L93 Difference]: Finished difference Result 21581 states and 31702 transitions. [2020-10-26 23:08:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:08:40,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 194 [2020-10-26 23:08:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:40,478 INFO L225 Difference]: With dead ends: 21581 [2020-10-26 23:08:40,478 INFO L226 Difference]: Without dead ends: 14327 [2020-10-26 23:08:40,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:08:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14327 states. [2020-10-26 23:08:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14327 to 14244. [2020-10-26 23:08:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14244 states. [2020-10-26 23:08:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14244 states to 14244 states and 19132 transitions. [2020-10-26 23:08:40,981 INFO L78 Accepts]: Start accepts. Automaton has 14244 states and 19132 transitions. Word has length 194 [2020-10-26 23:08:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:40,983 INFO L481 AbstractCegarLoop]: Abstraction has 14244 states and 19132 transitions. [2020-10-26 23:08:40,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:08:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 14244 states and 19132 transitions. [2020-10-26 23:08:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 23:08:40,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:40,987 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, 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, 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] [2020-10-26 23:08:40,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:08:40,987 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1073789222, now seen corresponding path program 1 times [2020-10-26 23:08:40,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:40,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915484063] [2020-10-26 23:08:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:41,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:42,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:44,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-26 23:08:44,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:08:44,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3926 [2020-10-26 23:08:44,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:08:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:44,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-26 23:08:44,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:45,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:45,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:45,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:08:45,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:45,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:45,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 23:08:45,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:45,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:45,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:45,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:08:45,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:45,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 23:08:45,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:45,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:45,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:45,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:08:45,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:08:45,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:08:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:45,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:45,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:45,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:08:45,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:45,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 23:08:45,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:45,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:45,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:45,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:08:45,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 23:08:45,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915484063] [2020-10-26 23:08:45,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:08:45,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:08:45,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787446614] [2020-10-26 23:08:45,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:45,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:45,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:45,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:45,727 INFO L87 Difference]: Start difference. First operand 14244 states and 19132 transitions. Second operand 7 states. [2020-10-26 23:09:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:15,521 INFO L93 Difference]: Finished difference Result 40778 states and 56855 transitions. [2020-10-26 23:09:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:09:15,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2020-10-26 23:09:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:15,620 INFO L225 Difference]: With dead ends: 40778 [2020-10-26 23:09:15,620 INFO L226 Difference]: Without dead ends: 26540 [2020-10-26 23:09:15,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-10-26 23:09:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 26402. [2020-10-26 23:09:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26402 states. [2020-10-26 23:09:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26402 states to 26402 states and 34270 transitions. [2020-10-26 23:09:16,516 INFO L78 Accepts]: Start accepts. Automaton has 26402 states and 34270 transitions. Word has length 197 [2020-10-26 23:09:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:16,517 INFO L481 AbstractCegarLoop]: Abstraction has 26402 states and 34270 transitions. [2020-10-26 23:09:16,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26402 states and 34270 transitions. [2020-10-26 23:09:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 23:09:16,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:16,523 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, 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, 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] [2020-10-26 23:09:16,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:09:16,523 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2072028683, now seen corresponding path program 1 times [2020-10-26 23:09:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:16,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958766277] [2020-10-26 23:09:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:16,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:16,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:21,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:21,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 23:09:21,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:09:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 23:09:21,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:09:21,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:21,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:21,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:21,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:21,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:21,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:21,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:09:21,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:21,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:21,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:21,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:21,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:21,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:22,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:22,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 23:09:22,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:22,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-26 23:09:22,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:22,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:09:22,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:09:22,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-26 23:09:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:22,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:22,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:09:22,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:22,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 23:09:22,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:22,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:09:22,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-26 23:09:22,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:09:22,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 42 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:09:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958766277] [2020-10-26 23:09:22,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:22,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:09:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563391923] [2020-10-26 23:09:22,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:22,428 INFO L87 Difference]: Start difference. First operand 26402 states and 34270 transitions. Second operand 7 states. [2020-10-26 23:09:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:43,090 INFO L93 Difference]: Finished difference Result 48318 states and 63848 transitions. [2020-10-26 23:09:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:09:43,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-26 23:09:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:43,182 INFO L225 Difference]: With dead ends: 48318 [2020-10-26 23:09:43,182 INFO L226 Difference]: Without dead ends: 26839 [2020-10-26 23:09:43,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:09:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26839 states. [2020-10-26 23:09:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26839 to 26587. [2020-10-26 23:09:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26587 states. [2020-10-26 23:09:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26587 states to 26587 states and 34545 transitions. [2020-10-26 23:09:43,774 INFO L78 Accepts]: Start accepts. Automaton has 26587 states and 34545 transitions. Word has length 238 [2020-10-26 23:09:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:43,774 INFO L481 AbstractCegarLoop]: Abstraction has 26587 states and 34545 transitions. [2020-10-26 23:09:43,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26587 states and 34545 transitions. [2020-10-26 23:09:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 23:09:43,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:43,779 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, 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, 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] [2020-10-26 23:09:43,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:09:43,780 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash 703468155, now seen corresponding path program 1 times [2020-10-26 23:09:43,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:43,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458195372] [2020-10-26 23:09:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:43,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:43,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:45,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:46,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:46,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 23:09:46,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:09:46,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2333 [2020-10-26 23:09:46,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:09:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:46,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 256 [2020-10-26 23:09:46,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:46,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:46,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:46,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:46,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:46,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:09:46,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:46,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:46,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:46,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:09:46,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-26 23:09:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:09:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:47,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:09:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:47,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:47,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:47,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:47,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:09:47,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:47,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-26 23:09:47,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:09:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:47,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:09:47,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:47,680 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-26 23:09:47,906 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-26 23:09:48,079 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-26 23:09:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:09:48,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458195372] [2020-10-26 23:09:48,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:48,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:09:48,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131693315] [2020-10-26 23:09:48,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:09:48,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:48,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:09:48,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:48,501 INFO L87 Difference]: Start difference. First operand 26587 states and 34545 transitions. Second operand 12 states. [2020-10-26 23:09:48,681 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-26 23:09:49,224 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 23:09:49,940 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2020-10-26 23:09:51,174 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-26 23:09:52,302 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-26 23:09:53,049 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-10-26 23:09:53,715 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-26 23:09:54,153 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-10-26 23:09:54,670 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-26 23:09:57,355 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-26 23:09:57,764 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-26 23:10:03,920 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-26 23:10:09,482 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-10-26 23:10:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:28,834 INFO L93 Difference]: Finished difference Result 36628 states and 52513 transitions. [2020-10-26 23:10:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 23:10:28,837 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2020-10-26 23:10:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:28,975 INFO L225 Difference]: With dead ends: 36628 [2020-10-26 23:10:28,976 INFO L226 Difference]: Without dead ends: 36625 [2020-10-26 23:10:28,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 23:10:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36625 states. [2020-10-26 23:10:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36625 to 30384. [2020-10-26 23:10:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30384 states. [2020-10-26 23:10:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30384 states to 30384 states and 41307 transitions. [2020-10-26 23:10:29,879 INFO L78 Accepts]: Start accepts. Automaton has 30384 states and 41307 transitions. Word has length 251 [2020-10-26 23:10:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:29,880 INFO L481 AbstractCegarLoop]: Abstraction has 30384 states and 41307 transitions. [2020-10-26 23:10:29,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:10:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 30384 states and 41307 transitions. [2020-10-26 23:10:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-26 23:10:29,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:29,889 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:10:29,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:10:29,890 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash -996951886, now seen corresponding path program 1 times [2020-10-26 23:10:29,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:29,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103644491] [2020-10-26 23:10:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:30,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:34,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:34,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-26 23:10:34,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:10:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 23:10:34,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:34,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:10:34,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:35,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:35,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:35,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:35,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:35,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:35,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:10:35,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:35,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 23:10:35,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:35,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:10:35,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:35,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:10:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:35,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:35,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:35,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:10:35,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:35,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 23:10:35,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:35,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 23:10:35,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-26 23:10:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:35,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:35,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 23:10:35,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:35,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 23:10:35,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-26 23:10:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 63 proven. 160 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 23:10:35,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103644491] [2020-10-26 23:10:35,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:35,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:10:35,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172767034] [2020-10-26 23:10:35,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:10:35,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:35,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:10:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:10:35,971 INFO L87 Difference]: Start difference. First operand 30384 states and 41307 transitions. Second operand 7 states. [2020-10-26 23:10:36,124 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68