/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_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:03:05,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:03:05,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:03:05,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:03:05,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:03:05,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:03:05,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:03:05,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:03:05,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:03:05,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:03:05,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:03:05,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:03:05,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:03:05,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:03:05,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:03:05,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:03:05,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:03:05,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:03:05,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:03:05,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:03:05,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:03:05,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:03:05,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:03:05,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:03:05,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:03:05,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:03:05,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:03:05,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:03:05,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:03:05,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:03:05,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:03:05,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:03:05,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:03:05,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:03:05,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:03:05,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:03:05,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:03:05,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:03:05,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:03:05,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:03:05,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:03:05,676 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 23:03:05,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:03:05,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:03:05,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:03:05,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:03:05,707 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:03:05,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:03:05,707 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:03:05,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:03:05,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:03:05,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:03:05,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:03:05,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:03:05,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:03:05,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:03:05,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:03:05,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:03:05,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:03:05,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:03:05,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:03:05,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:03:05,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:03:05,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:03:05,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:03:05,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:03:05,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:03:05,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:03:05,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:03:05,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:03:05,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:03:05,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:03:06,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:03:06,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:03:06,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:03:06,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:03:06,135 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:03:06,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label03.c [2020-10-26 23:03:06,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8458001cd/e21480cb23874fb1aab84b4bc02f50f2/FLAG387c0eedd [2020-10-26 23:03:07,458 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:03:07,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label03.c [2020-10-26 23:03:07,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8458001cd/e21480cb23874fb1aab84b4bc02f50f2/FLAG387c0eedd [2020-10-26 23:03:07,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8458001cd/e21480cb23874fb1aab84b4bc02f50f2 [2020-10-26 23:03:07,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:03:07,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:03:07,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:03:07,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:03:07,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:03:07,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:03:07" (1/1) ... [2020-10-26 23:03:07,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139b64ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:07, skipping insertion in model container [2020-10-26 23:03:07,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:03:07" (1/1) ... [2020-10-26 23:03:07,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:03:08,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:03:09,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:03:09,603 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:03:10,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:03:10,369 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:03:10,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10 WrapperNode [2020-10-26 23:03:10,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:03:10,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:03:10,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:03:10,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:03:10,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (1/1) ... [2020-10-26 23:03:10,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:03:10,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:03:10,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:03:10,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:03:10,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (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 23:03:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:03:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:03:10,884 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:03:10,885 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:03:10,885 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:03:10,886 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:03:10,886 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:03:10,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:03:10,886 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:03:10,886 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:03:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:03:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:03:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:03:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:03:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:03:10,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:03:10,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:03:10,889 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:03:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:03:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:03:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:03:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:03:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:03:10,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:03:10,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:03:21,420 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:03:21,421 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:03:21,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:03:21 BoogieIcfgContainer [2020-10-26 23:03:21,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:03:21,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:03:21,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:03:21,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:03:21,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:03:07" (1/3) ... [2020-10-26 23:03:21,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bda10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:03:21, skipping insertion in model container [2020-10-26 23:03:21,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:03:10" (2/3) ... [2020-10-26 23:03:21,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76bda10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:03:21, skipping insertion in model container [2020-10-26 23:03:21,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:03:21" (3/3) ... [2020-10-26 23:03:21,440 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2020-10-26 23:03:21,454 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:03:21,461 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:03:21,476 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:03:21,527 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:03:21,528 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:03:21,528 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:03:21,528 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:03:21,528 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:03:21,528 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:03:21,528 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:03:21,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:03:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:03:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 23:03:21,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:21,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:03:21,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash -947590918, now seen corresponding path program 1 times [2020-10-26 23:03:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:21,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779734582] [2020-10-26 23:03:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:22,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:22,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 23:03:22,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:22,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-26 23:03:22,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:03:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:03:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 23:03:22,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:03:22,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:22,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:22,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:22,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:22,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:22,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 23:03:22,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:03:22,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:22,719 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 23:03:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779734582] [2020-10-26 23:03:22,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:03:22,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:03:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795891028] [2020-10-26 23:03:22,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:03:22,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:03:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:03:22,757 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-26 23:03:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:51,447 INFO L93 Difference]: Finished difference Result 4083 states and 7566 transitions. [2020-10-26 23:03:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:03:51,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-26 23:03:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:51,512 INFO L225 Difference]: With dead ends: 4083 [2020-10-26 23:03:51,512 INFO L226 Difference]: Without dead ends: 2871 [2020-10-26 23:03:51,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2020-10-26 23:03:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 1934. [2020-10-26 23:03:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1934 states. [2020-10-26 23:03:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3163 transitions. [2020-10-26 23:03:51,770 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3163 transitions. Word has length 41 [2020-10-26 23:03:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:51,772 INFO L481 AbstractCegarLoop]: Abstraction has 1934 states and 3163 transitions. [2020-10-26 23:03:51,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:03:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3163 transitions. [2020-10-26 23:03:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 23:03:51,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:51,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:51,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:03:51,784 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1575781023, now seen corresponding path program 1 times [2020-10-26 23:03:51,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:51,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437099593] [2020-10-26 23:03:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:53,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:53,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 23:03:53,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:03:53,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2001 [2020-10-26 23:03:53,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:53,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:03:53,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:03:53,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:03:53,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:03:54,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:54,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:54,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:54,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:54,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:54,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 23:03:54,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:54,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:54,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:54,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:03:54,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:54,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:03:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:54,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:54,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:03:54,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:54,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 23:03:54,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:03:54,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:03:54,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:03:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:03:54,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437099593] [2020-10-26 23:03:54,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:03:54,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:03:54,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092752927] [2020-10-26 23:03:54,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:03:54,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:03:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:54,434 INFO L87 Difference]: Start difference. First operand 1934 states and 3163 transitions. Second operand 7 states. [2020-10-26 23:04:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:19,595 INFO L93 Difference]: Finished difference Result 5612 states and 9265 transitions. [2020-10-26 23:04:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:04:19,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-10-26 23:04:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:19,627 INFO L225 Difference]: With dead ends: 5612 [2020-10-26 23:04:19,627 INFO L226 Difference]: Without dead ends: 3684 [2020-10-26 23:04:19,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 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 23:04:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2020-10-26 23:04:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3615. [2020-10-26 23:04:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3615 states. [2020-10-26 23:04:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 5138 transitions. [2020-10-26 23:04:19,763 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 5138 transitions. Word has length 116 [2020-10-26 23:04:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:19,763 INFO L481 AbstractCegarLoop]: Abstraction has 3615 states and 5138 transitions. [2020-10-26 23:04:19,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:19,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 5138 transitions. [2020-10-26 23:04:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 23:04:19,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:19,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:19,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:04:19,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 48387581, now seen corresponding path program 1 times [2020-10-26 23:04:19,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:19,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418858522] [2020-10-26 23:04:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:19,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:20,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:20,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:20,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 23:04:20,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-26 23:04:20,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:20,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:04:20,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:20,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:20,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:20,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:20,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:20,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 23:04:20,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:20,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:21,142 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-10-26 23:04:21,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:21,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:21,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:04:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 23:04:21,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:04:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418858522] [2020-10-26 23:04:21,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:21,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531164190] [2020-10-26 23:04:21,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:21,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:21,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:21,527 INFO L87 Difference]: Start difference. First operand 3615 states and 5138 transitions. Second operand 7 states. [2020-10-26 23:04:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:45,519 INFO L93 Difference]: Finished difference Result 10684 states and 15400 transitions. [2020-10-26 23:04:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:04:45,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2020-10-26 23:04:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:45,562 INFO L225 Difference]: With dead ends: 10684 [2020-10-26 23:04:45,562 INFO L226 Difference]: Without dead ends: 7075 [2020-10-26 23:04:45,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:04:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2020-10-26 23:04:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 6984. [2020-10-26 23:04:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6984 states. [2020-10-26 23:04:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 8992 transitions. [2020-10-26 23:04:45,808 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 8992 transitions. Word has length 146 [2020-10-26 23:04:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:45,811 INFO L481 AbstractCegarLoop]: Abstraction has 6984 states and 8992 transitions. [2020-10-26 23:04:45,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 8992 transitions. [2020-10-26 23:04:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-26 23:04:45,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:45,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:04:45,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:04:45,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2022200982, now seen corresponding path program 1 times [2020-10-26 23:04:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:45,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714808874] [2020-10-26 23:04:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:46,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:50,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:50,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 23:04:50,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:04:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 23:04:50,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:04:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:51,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:51,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:51,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:51,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:51,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:04:51,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:51,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:51,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:51,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:51,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:04:51,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:51,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-26 23:04:51,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:04:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:51,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:04:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:51,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:51,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:04:51,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:51,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 23:04:51,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:51,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:04:51,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:04:51,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:04:51,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:04:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 66 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:04:51,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714808874] [2020-10-26 23:04:51,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:04:51,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:04:51,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976117519] [2020-10-26 23:04:51,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:51,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:51,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:51,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:51,730 INFO L87 Difference]: Start difference. First operand 6984 states and 8992 transitions. Second operand 7 states. [2020-10-26 23:05:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:18,218 INFO L93 Difference]: Finished difference Result 13390 states and 17528 transitions. [2020-10-26 23:05:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:05:18,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2020-10-26 23:05:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:18,255 INFO L225 Difference]: With dead ends: 13390 [2020-10-26 23:05:18,255 INFO L226 Difference]: Without dead ends: 7215 [2020-10-26 23:05:18,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:05:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7215 states. [2020-10-26 23:05:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7215 to 7027. [2020-10-26 23:05:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7027 states. [2020-10-26 23:05:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 9071 transitions. [2020-10-26 23:05:18,445 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 9071 transitions. Word has length 241 [2020-10-26 23:05:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:18,447 INFO L481 AbstractCegarLoop]: Abstraction has 7027 states and 9071 transitions. [2020-10-26 23:05:18,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:05:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 9071 transitions. [2020-10-26 23:05:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-26 23:05:18,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:18,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:05:18,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:05:18,452 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:18,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1946658630, now seen corresponding path program 1 times [2020-10-26 23:05:18,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:18,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138299019] [2020-10-26 23:05:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:18,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:21,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:21,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 23:05:21,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:05:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3467 [2020-10-26 23:05:21,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:21,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:05:21,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:21,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:05:21,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:22,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:22,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:22,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:22,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:22,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:22,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:05:22,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:22,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:22,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:22,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:05:22,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:22,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-26 23:05:22,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:05:22,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:22,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:05:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:22,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:23,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:23,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:05:23,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:23,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 23:05:23,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:05:23,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:05:23,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138299019] [2020-10-26 23:05:23,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:05:23,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:05:23,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108058093] [2020-10-26 23:05:23,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:05:23,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:23,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:05:23,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:05:23,239 INFO L87 Difference]: Start difference. First operand 7027 states and 9071 transitions. Second operand 8 states. [2020-10-26 23:05:23,511 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:05:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:47,863 INFO L93 Difference]: Finished difference Result 18715 states and 25714 transitions. [2020-10-26 23:05:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:05:47,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 246 [2020-10-26 23:05:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:47,940 INFO L225 Difference]: With dead ends: 18715 [2020-10-26 23:05:47,940 INFO L226 Difference]: Without dead ends: 12497 [2020-10-26 23:05:47,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:05:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12497 states. [2020-10-26 23:05:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12497 to 11448. [2020-10-26 23:05:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11448 states. [2020-10-26 23:05:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11448 states to 11448 states and 14593 transitions. [2020-10-26 23:05:48,380 INFO L78 Accepts]: Start accepts. Automaton has 11448 states and 14593 transitions. Word has length 246 [2020-10-26 23:05:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:48,381 INFO L481 AbstractCegarLoop]: Abstraction has 11448 states and 14593 transitions. [2020-10-26 23:05:48,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:05:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 11448 states and 14593 transitions. [2020-10-26 23:05:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 23:05:48,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:48,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:05:48,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:05:48,387 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1071234211, now seen corresponding path program 1 times [2020-10-26 23:05:48,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:48,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206815428] [2020-10-26 23:05:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:48,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:49,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:49,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 23:05:49,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:49,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-10-26 23:05:49,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:05:49,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:05:49,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:49,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:49,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:49,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:49,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:49,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:05:49,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:49,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:05:49,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:49,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:05:49,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:49,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:50,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:50,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:50,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:05:50,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 23:05:50,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:50,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:50,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:05:50,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:50,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:05:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:50,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:50,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:50,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:05:50,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:50,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-26 23:05:50,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:50,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:50,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:05:50,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:05:50,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206815428] [2020-10-26 23:05:50,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:05:50,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:05:50,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252242396] [2020-10-26 23:05:50,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:05:50,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:50,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:05:50,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:05:50,515 INFO L87 Difference]: Start difference. First operand 11448 states and 14593 transitions. Second operand 7 states. [2020-10-26 23:06:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:20,907 INFO L93 Difference]: Finished difference Result 28477 states and 38515 transitions. [2020-10-26 23:06:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:06:20,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-26 23:06:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:20,983 INFO L225 Difference]: With dead ends: 28477 [2020-10-26 23:06:20,984 INFO L226 Difference]: Without dead ends: 17838 [2020-10-26 23:06:21,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:06:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17838 states. [2020-10-26 23:06:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17838 to 17668. [2020-10-26 23:06:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17668 states. [2020-10-26 23:06:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17668 states to 17668 states and 22371 transitions. [2020-10-26 23:06:21,633 INFO L78 Accepts]: Start accepts. Automaton has 17668 states and 22371 transitions. Word has length 248 [2020-10-26 23:06:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:21,634 INFO L481 AbstractCegarLoop]: Abstraction has 17668 states and 22371 transitions. [2020-10-26 23:06:21,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:06:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 17668 states and 22371 transitions. [2020-10-26 23:06:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-26 23:06:21,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:21,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:06:21,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:06:21,641 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1928353061, now seen corresponding path program 1 times [2020-10-26 23:06:21,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:21,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664955046] [2020-10-26 23:06:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:21,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:22,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:22,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:23,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:23,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-26 23:06:23,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:06:23,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1853 [2020-10-26 23:06:23,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:06:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-26 23:06:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:23,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:23,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:23,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:23,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:23,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:23,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:06:23,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:06:23,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:23,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:23,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:23,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:23,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:23,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:06:23,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:23,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 23:06:23,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:23,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:23,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:23,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 23:06:23,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:24,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:06:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:24,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:24,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:24,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:06:24,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-26 23:06:24,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:06:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:06:24,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:06:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 23:06:24,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664955046] [2020-10-26 23:06:24,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:06:24,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 23:06:24,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757170623] [2020-10-26 23:06:24,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:06:24,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:24,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:06:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:06:24,292 INFO L87 Difference]: Start difference. First operand 17668 states and 22371 transitions. Second operand 5 states. [2020-10-26 23:06:24,433 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:06:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:42,905 INFO L93 Difference]: Finished difference Result 28794 states and 37365 transitions. [2020-10-26 23:06:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:06:42,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 260 [2020-10-26 23:06:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:42,964 INFO L225 Difference]: With dead ends: 28794 [2020-10-26 23:06:42,964 INFO L226 Difference]: Without dead ends: 17673 [2020-10-26 23:06:42,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:06:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17673 states. [2020-10-26 23:06:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17673 to 17646. [2020-10-26 23:06:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17646 states. [2020-10-26 23:06:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17646 states to 17646 states and 22332 transitions. [2020-10-26 23:06:43,416 INFO L78 Accepts]: Start accepts. Automaton has 17646 states and 22332 transitions. Word has length 260 [2020-10-26 23:06:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:43,417 INFO L481 AbstractCegarLoop]: Abstraction has 17646 states and 22332 transitions. [2020-10-26 23:06:43,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:06:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17646 states and 22332 transitions. [2020-10-26 23:06:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-26 23:06:43,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:43,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:06:43,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:06:43,424 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1130849713, now seen corresponding path program 1 times [2020-10-26 23:06:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:43,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329323256] [2020-10-26 23:06:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:43,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:44,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:45,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:45,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-26 23:06:45,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:06:45,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-26 23:06:45,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:06:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 23:06:45,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:46,097 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:06:46,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:46,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:46,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:46,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:46,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:06:46,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:06:46,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:46,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:06:46,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:46,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:46,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:46,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:06:46,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 23:06:46,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:06:46,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:06:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:46,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:46,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:46,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:06:46,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:46,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 23:06:46,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:46,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:46,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:46,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:06:46,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:06:46,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329323256] [2020-10-26 23:06:46,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:06:46,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:06:46,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683031678] [2020-10-26 23:06:46,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:06:46,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:46,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:06:46,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:06:46,770 INFO L87 Difference]: Start difference. First operand 17646 states and 22332 transitions. Second operand 7 states.