/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:17:54,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:17:54,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:17:54,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:17:54,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:17:54,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:17:54,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:17:54,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:17:54,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:17:54,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:17:54,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:17:54,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:17:54,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:17:54,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:17:54,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:17:54,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:17:54,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:17:54,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:17:54,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:17:54,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:17:54,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:17:54,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:17:54,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:17:54,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:17:54,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:17:54,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:17:54,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:17:54,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:17:54,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:17:54,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:17:54,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:17:54,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:17:54,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:17:54,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:17:54,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:17:54,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:17:54,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:17:54,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:17:54,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:17:54,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:17:54,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:17:54,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 12:17:54,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:17:54,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:17:54,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:17:54,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:17:54,761 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:17:54,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:17:54,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:17:54,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:17:54,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:17:54,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:17:54,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:17:54,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:17:54,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:17:54,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:17:54,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:17:54,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:17:54,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:17:54,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:17:54,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:17:54,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:17:54,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:17:54,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:17:54,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:17:54,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:17:54,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:17:54,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:17:54,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:17:54,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:17:54,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:17:54,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:17:55,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:17:55,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:17:55,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:17:55,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:17:55,315 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:17:55,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label21.c [2020-10-28 12:17:55,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e6fe6a3/163c1db4ccf849b2a3a773a8995f3ed2/FLAG82b100eb4 [2020-10-28 12:17:56,435 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:17:56,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label21.c [2020-10-28 12:17:56,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e6fe6a3/163c1db4ccf849b2a3a773a8995f3ed2/FLAG82b100eb4 [2020-10-28 12:17:56,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e6fe6a3/163c1db4ccf849b2a3a773a8995f3ed2 [2020-10-28 12:17:56,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:17:56,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:17:56,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:17:56,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:17:56,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:17:56,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:17:56" (1/1) ... [2020-10-28 12:17:56,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9a57f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:56, skipping insertion in model container [2020-10-28 12:17:56,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:17:56" (1/1) ... [2020-10-28 12:17:56,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:17:57,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:17:58,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:17:58,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:17:59,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:17:59,393 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:17:59,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59 WrapperNode [2020-10-28 12:17:59,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:17:59,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:17:59,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:17:59,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:17:59,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... [2020-10-28 12:17:59,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:17:59,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:17:59,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:17:59,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:17:59,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:17:59,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:17:59,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:17:59,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:17:59,805 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:17:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:17:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:17:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:17:59,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:17:59,806 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:17:59,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:17:59,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:17:59,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:17:59,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:17:59,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:17:59,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:17:59,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:17:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:17:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:17:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:17:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:17:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:17:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:17:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:17:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:17:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:18:05,425 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:18:05,426 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:18:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:05 BoogieIcfgContainer [2020-10-28 12:18:05,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:18:05,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:18:05,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:18:05,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:18:05,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:17:56" (1/3) ... [2020-10-28 12:18:05,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af65053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:05, skipping insertion in model container [2020-10-28 12:18:05,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:17:59" (2/3) ... [2020-10-28 12:18:05,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af65053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:05, skipping insertion in model container [2020-10-28 12:18:05,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:05" (3/3) ... [2020-10-28 12:18:05,447 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label21.c [2020-10-28 12:18:05,462 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:18:05,470 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:18:05,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:18:05,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:18:05,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:18:05,539 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:18:05,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:18:05,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:18:05,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:18:05,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:18:05,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:18:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-28 12:18:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 12:18:05,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:05,601 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] [2020-10-28 12:18:05,601 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:05,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1569486748, now seen corresponding path program 1 times [2020-10-28 12:18:05,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:05,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221028860] [2020-10-28 12:18:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:05,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:06,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:06,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 12:18:06,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-28 12:18:06,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:06,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:06,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:18:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:18:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 12:18:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:18:06,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:18:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:06,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:06,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:18:06,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:06,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 12:18:06,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:06,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:18:06,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:18:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:18:06,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221028860] [2020-10-28 12:18:06,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:18:06,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:18:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474151134] [2020-10-28 12:18:06,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:18:06,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:18:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:18:06,698 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-28 12:18:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:18:17,776 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-28 12:18:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:18:17,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 12:18:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:18:17,817 INFO L225 Difference]: With dead ends: 2476 [2020-10-28 12:18:17,817 INFO L226 Difference]: Without dead ends: 1569 [2020-10-28 12:18:17,827 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 [2020-10-28 12:18:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-28 12:18:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-28 12:18:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-28 12:18:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2522 transitions. [2020-10-28 12:18:18,026 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2522 transitions. Word has length 29 [2020-10-28 12:18:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:18:18,027 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2522 transitions. [2020-10-28 12:18:18,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:18:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2522 transitions. [2020-10-28 12:18:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 12:18:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:18,038 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] [2020-10-28 12:18:18,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:18:18,040 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1354067749, now seen corresponding path program 1 times [2020-10-28 12:18:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:18,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322038384] [2020-10-28 12:18:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:18,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:18,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:19,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:19,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 12:18:19,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:18:19,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-28 12:18:19,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:19,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:18:19,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:18:19,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 12:18:19,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 12:18:19,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:18:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:19,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:19,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:19,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:18:19,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:18:19,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:19,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:19,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:18:19,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:19,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:18:19,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 12:18:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:18:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:19,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:19,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:18:19,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:19,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 12:18:19,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:19,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:19,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:18:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:18:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:18:19,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322038384] [2020-10-28 12:18:19,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:18:19,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:18:19,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141416879] [2020-10-28 12:18:19,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:18:19,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:18:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:18:19,512 INFO L87 Difference]: Start difference. First operand 1554 states and 2522 transitions. Second operand 5 states. [2020-10-28 12:18:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:18:30,778 INFO L93 Difference]: Finished difference Result 4673 states and 7650 transitions. [2020-10-28 12:18:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:18:30,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-28 12:18:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:18:30,800 INFO L225 Difference]: With dead ends: 4673 [2020-10-28 12:18:30,801 INFO L226 Difference]: Without dead ends: 3125 [2020-10-28 12:18:30,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:18:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2020-10-28 12:18:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3112. [2020-10-28 12:18:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3112 states. [2020-10-28 12:18:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 4442 transitions. [2020-10-28 12:18:30,907 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 4442 transitions. Word has length 104 [2020-10-28 12:18:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:18:30,908 INFO L481 AbstractCegarLoop]: Abstraction has 3112 states and 4442 transitions. [2020-10-28 12:18:30,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:18:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 4442 transitions. [2020-10-28 12:18:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 12:18:30,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:30,911 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] [2020-10-28 12:18:30,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:18:30,912 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1839809325, now seen corresponding path program 1 times [2020-10-28 12:18:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:30,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417026329] [2020-10-28 12:18:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:30,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:31,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:31,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:32,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:32,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 12:18:32,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:18:32,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-28 12:18:32,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:32,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:32,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:18:32,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:18:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 12:18:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:18:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:18:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:32,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:32,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:18:32,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:32,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 12:18:32,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:32,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:18:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:18:32,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:18:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:32,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:32,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:32,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 12:18:32,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-28 12:18:32,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:32,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:18:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:18:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 12:18:32,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:18:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:18:32,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417026329] [2020-10-28 12:18:32,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:18:32,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:18:32,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080257491] [2020-10-28 12:18:32,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:18:32,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:32,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:18:32,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:18:32,781 INFO L87 Difference]: Start difference. First operand 3112 states and 4442 transitions. Second operand 7 states. [2020-10-28 12:18:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:18:48,382 INFO L93 Difference]: Finished difference Result 9498 states and 13842 transitions. [2020-10-28 12:18:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:18:48,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-28 12:18:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:18:48,428 INFO L225 Difference]: With dead ends: 9498 [2020-10-28 12:18:48,428 INFO L226 Difference]: Without dead ends: 6392 [2020-10-28 12:18:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:18:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2020-10-28 12:18:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 6326. [2020-10-28 12:18:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6326 states. [2020-10-28 12:18:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6326 states to 6326 states and 8187 transitions. [2020-10-28 12:18:48,667 INFO L78 Accepts]: Start accepts. Automaton has 6326 states and 8187 transitions. Word has length 108 [2020-10-28 12:18:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:18:48,670 INFO L481 AbstractCegarLoop]: Abstraction has 6326 states and 8187 transitions. [2020-10-28 12:18:48,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:18:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6326 states and 8187 transitions. [2020-10-28 12:18:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 12:18:48,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:18:48,681 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] [2020-10-28 12:18:48,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:18:48,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:18:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:18:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1606244665, now seen corresponding path program 1 times [2020-10-28 12:18:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:18:48,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642787628] [2020-10-28 12:18:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:18:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:49,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:49,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:49,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 12:18:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:18:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-28 12:18:49,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:49,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:18:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:18:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 12:18:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:18:49,699 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:18:49,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:18:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:49,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:49,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:18:49,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:49,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 12:18:49,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:49,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:49,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:18:49,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:18:49,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:18:49,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:18:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:18:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:18:49,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:18:49,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:18:49,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 12:18:49,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:18:49,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 12:18:49,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:18:49,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:18:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:18:49,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:18:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 12:18:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:18:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:18:50,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642787628] [2020-10-28 12:18:50,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:18:50,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:18:50,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294814619] [2020-10-28 12:18:50,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:18:50,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:18:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:18:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:18:50,017 INFO L87 Difference]: Start difference. First operand 6326 states and 8187 transitions. Second operand 7 states. [2020-10-28 12:19:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:19:06,246 INFO L93 Difference]: Finished difference Result 19252 states and 25379 transitions. [2020-10-28 12:19:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:19:06,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-28 12:19:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:19:06,318 INFO L225 Difference]: With dead ends: 19252 [2020-10-28 12:19:06,318 INFO L226 Difference]: Without dead ends: 12932 [2020-10-28 12:19:06,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:19:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12932 states. [2020-10-28 12:19:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12932 to 11275. [2020-10-28 12:19:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11275 states. [2020-10-28 12:19:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11275 states to 11275 states and 14260 transitions. [2020-10-28 12:19:06,751 INFO L78 Accepts]: Start accepts. Automaton has 11275 states and 14260 transitions. Word has length 114 [2020-10-28 12:19:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:19:06,753 INFO L481 AbstractCegarLoop]: Abstraction has 11275 states and 14260 transitions. [2020-10-28 12:19:06,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:19:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11275 states and 14260 transitions. [2020-10-28 12:19:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-28 12:19:06,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:19:06,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:19:06,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:19:06,758 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:19:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:19:06,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1267219885, now seen corresponding path program 1 times [2020-10-28 12:19:06,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:19:06,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282131420] [2020-10-28 12:19:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:19:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:06,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:08,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:08,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 12:19:08,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:19:08,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-10-28 12:19:08,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:08,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:19:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:19:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-28 12:19:08,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:19:09,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:19:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:09,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:09,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:19:09,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:09,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:19:09,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:09,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:09,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:19:09,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:09,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:19:09,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:09,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:19:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:09,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:09,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:09,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 12:19:09,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-28 12:19:09,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:09,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:19:09,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:19:09,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 12:19:09,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:19:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:19:09,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282131420] [2020-10-28 12:19:09,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:19:09,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 12:19:09,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438256959] [2020-10-28 12:19:09,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:19:09,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:19:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:19:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:19:09,858 INFO L87 Difference]: Start difference. First operand 11275 states and 14260 transitions. Second operand 8 states. [2020-10-28 12:19:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:19:32,122 INFO L93 Difference]: Finished difference Result 30908 states and 38566 transitions. [2020-10-28 12:19:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 12:19:32,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 177 [2020-10-28 12:19:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:19:32,217 INFO L225 Difference]: With dead ends: 30908 [2020-10-28 12:19:32,217 INFO L226 Difference]: Without dead ends: 19639 [2020-10-28 12:19:32,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-28 12:19:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19639 states. [2020-10-28 12:19:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19639 to 18623. [2020-10-28 12:19:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-10-28 12:19:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 22628 transitions. [2020-10-28 12:19:32,922 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 22628 transitions. Word has length 177 [2020-10-28 12:19:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:19:32,923 INFO L481 AbstractCegarLoop]: Abstraction has 18623 states and 22628 transitions. [2020-10-28 12:19:32,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:19:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 22628 transitions. [2020-10-28 12:19:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 12:19:32,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:19:32,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:19:32,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:19:32,928 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:19:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:19:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash -967383856, now seen corresponding path program 1 times [2020-10-28 12:19:32,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:19:32,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580193726] [2020-10-28 12:19:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:19:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:33,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:33,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:33,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:35,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:35,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 12:19:35,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:19:35,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2426 [2020-10-28 12:19:35,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:35,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:19:35,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:19:35,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 12:19:35,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:35,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:19:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:35,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:35,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:19:35,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:35,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:19:35,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:35,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:19:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:19:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:35,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:19:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:35,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:35,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:35,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:19:35,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:35,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 12:19:35,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:35,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:35,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:19:35,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:19:35,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:19:35,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:35,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:19:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:19:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:19:36,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:19:36,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 12:19:36,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:19:36,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 12:19:36,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:19:36,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:19:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:19:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:19:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 12:19:36,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:19:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:19:36,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580193726] [2020-10-28 12:19:36,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:19:36,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 12:19:36,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023345477] [2020-10-28 12:19:36,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 12:19:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:19:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 12:19:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 12:19:36,257 INFO L87 Difference]: Start difference. First operand 18623 states and 22628 transitions. Second operand 8 states. [2020-10-28 12:20:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:20:09,182 INFO L93 Difference]: Finished difference Result 50390 states and 63094 transitions. [2020-10-28 12:20:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 12:20:09,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 217 [2020-10-28 12:20:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:20:09,313 INFO L225 Difference]: With dead ends: 50390 [2020-10-28 12:20:09,313 INFO L226 Difference]: Without dead ends: 32540 [2020-10-28 12:20:09,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 12:20:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32540 states. [2020-10-28 12:20:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32540 to 31524. [2020-10-28 12:20:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31524 states. [2020-10-28 12:20:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31524 states to 31524 states and 37299 transitions. [2020-10-28 12:20:10,462 INFO L78 Accepts]: Start accepts. Automaton has 31524 states and 37299 transitions. Word has length 217 [2020-10-28 12:20:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:20:10,463 INFO L481 AbstractCegarLoop]: Abstraction has 31524 states and 37299 transitions. [2020-10-28 12:20:10,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 12:20:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 31524 states and 37299 transitions. [2020-10-28 12:20:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-28 12:20:10,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:20:10,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:20:10,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:20:10,469 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:20:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:20:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash -704182594, now seen corresponding path program 1 times [2020-10-28 12:20:10,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:20:10,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798101295] [2020-10-28 12:20:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:20:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:10,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:10,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:11,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:12,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:12,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-28 12:20:12,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:20:12,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1786 [2020-10-28 12:20:12,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:12,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 12:20:12,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 12:20:12,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:12,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:20:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:12,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:12,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:20:12,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:12,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:20:12,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:12,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:20:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:20:12,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:12,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:20:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:12,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:12,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:12,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:20:12,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:12,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 12:20:12,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:12,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:12,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:20:12,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:12,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:20:12,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:12,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 12:20:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:12,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:12,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:12,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 12:20:12,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:12,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-28 12:20:12,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:12,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:20:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 12:20:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:20:13,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798101295] [2020-10-28 12:20:13,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:20:13,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:20:13,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622601811] [2020-10-28 12:20:13,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:20:13,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:20:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:20:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:20:13,057 INFO L87 Difference]: Start difference. First operand 31524 states and 37299 transitions. Second operand 7 states. [2020-10-28 12:20:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:20:35,902 INFO L93 Difference]: Finished difference Result 75220 states and 91552 transitions. [2020-10-28 12:20:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:20:35,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 228 [2020-10-28 12:20:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:20:36,037 INFO L225 Difference]: With dead ends: 75220 [2020-10-28 12:20:36,037 INFO L226 Difference]: Without dead ends: 40448 [2020-10-28 12:20:36,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:20:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40448 states. [2020-10-28 12:20:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40448 to 39404. [2020-10-28 12:20:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39404 states. [2020-10-28 12:20:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39404 states to 39404 states and 45532 transitions. [2020-10-28 12:20:37,287 INFO L78 Accepts]: Start accepts. Automaton has 39404 states and 45532 transitions. Word has length 228 [2020-10-28 12:20:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:20:37,288 INFO L481 AbstractCegarLoop]: Abstraction has 39404 states and 45532 transitions. [2020-10-28 12:20:37,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:20:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 39404 states and 45532 transitions. [2020-10-28 12:20:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-28 12:20:37,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:20:37,293 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, 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] [2020-10-28 12:20:37,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:20:37,294 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:20:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:20:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1065365240, now seen corresponding path program 1 times [2020-10-28 12:20:37,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:20:37,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992892728] [2020-10-28 12:20:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:20:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:37,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:38,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:38,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-28 12:20:38,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1500 [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 12:20:38,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:39,043 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:20:39,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:20:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:39,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:39,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:20:39,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:39,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:20:39,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:39,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:20:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:20:39,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:20:39,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:20:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:39,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:39,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 12:20:39,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:39,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-28 12:20:39,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:39,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:20:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:20:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-28 12:20:39,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:39,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-28 12:20:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:20:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:20:39,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:20:39,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 12:20:39,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:20:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-28 12:20:39,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:20:39,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:20:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:20:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:20:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 12:20:39,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:20:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:20:39,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992892728] [2020-10-28 12:20:39,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:20:39,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:20:39,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100212412] [2020-10-28 12:20:39,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:20:39,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:20:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:20:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:20:39,744 INFO L87 Difference]: Start difference. First operand 39404 states and 45532 transitions. Second operand 7 states. [2020-10-28 12:21:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:21:03,748 INFO L93 Difference]: Finished difference Result 106386 states and 126087 transitions. [2020-10-28 12:21:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:21:03,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 289 [2020-10-28 12:21:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:21:03,974 INFO L225 Difference]: With dead ends: 106386 [2020-10-28 12:21:03,974 INFO L226 Difference]: Without dead ends: 67755 [2020-10-28 12:21:04,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:21:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67755 states. [2020-10-28 12:21:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67755 to 66108. [2020-10-28 12:21:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66108 states. [2020-10-28 12:21:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66108 states to 66108 states and 77606 transitions. [2020-10-28 12:21:05,877 INFO L78 Accepts]: Start accepts. Automaton has 66108 states and 77606 transitions. Word has length 289 [2020-10-28 12:21:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:21:05,878 INFO L481 AbstractCegarLoop]: Abstraction has 66108 states and 77606 transitions. [2020-10-28 12:21:05,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:21:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 66108 states and 77606 transitions. [2020-10-28 12:21:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-28 12:21:05,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:21:05,896 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, 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] [2020-10-28 12:21:05,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 12:21:05,896 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:21:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:21:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1788802297, now seen corresponding path program 1 times [2020-10-28 12:21:05,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:21:05,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055539843] [2020-10-28 12:21:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:21:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:06,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:06,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:10,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:10,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-28 12:21:10,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:21:10,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4833 [2020-10-28 12:21:10,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:10,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:10,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:21:10,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-28 12:21:10,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 12:21:10,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:11,024 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:21:11,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:21:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:11,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:11,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:21:11,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:21:11,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:11,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:21:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:21:11,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:21:11,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:21:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:11,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:11,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:11,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 12:21:11,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:11,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-28 12:21:11,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:11,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:21:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:21:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 12:21:11,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:11,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-28 12:21:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:11,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:11,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:21:11,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:11,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 12:21:11,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:11,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:21:11,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:21:11,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:21:11,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:11,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-10-28 12:21:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:21:11,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:21:11,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:21:11,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 12:21:11,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:21:11,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 12:21:11,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:21:11,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:21:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:21:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 12:21:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:21:11,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:21:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-28 12:21:11,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055539843] [2020-10-28 12:21:11,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:21:11,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:21:11,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742993969] [2020-10-28 12:21:11,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:21:11,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:21:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:21:11,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:21:11,736 INFO L87 Difference]: Start difference. First operand 66108 states and 77606 transitions. Second operand 7 states. [2020-10-28 12:21:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:21:35,087 INFO L93 Difference]: Finished difference Result 156810 states and 192437 transitions. [2020-10-28 12:21:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:21:35,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 340 [2020-10-28 12:21:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:21:35,612 INFO L225 Difference]: With dead ends: 156810 [2020-10-28 12:21:35,613 INFO L226 Difference]: Without dead ends: 91475 [2020-10-28 12:21:35,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:21:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91475 states.