/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 07:14:05,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 07:14:05,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 07:14:05,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 07:14:05,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 07:14:05,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 07:14:05,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 07:14:05,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 07:14:05,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 07:14:05,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 07:14:05,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 07:14:05,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 07:14:05,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 07:14:05,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 07:14:05,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 07:14:05,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 07:14:05,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 07:14:05,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 07:14:05,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 07:14:05,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 07:14:05,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 07:14:05,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 07:14:05,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 07:14:05,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 07:14:05,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 07:14:05,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 07:14:05,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 07:14:05,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 07:14:05,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 07:14:05,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 07:14:05,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 07:14:05,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 07:14:05,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 07:14:05,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 07:14:05,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 07:14:05,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 07:14:05,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 07:14:05,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 07:14:05,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 07:14:05,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 07:14:05,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 07:14:05,797 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 [2020-10-29 07:14:05,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 07:14:05,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 07:14:05,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 07:14:05,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 07:14:05,840 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 07:14:05,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 07:14:05,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 07:14:05,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 07:14:05,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 07:14:05,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 07:14:05,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 07:14:05,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 07:14:05,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 07:14:05,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 07:14:05,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 07:14:05,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 07:14:05,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 07:14:05,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 07:14:05,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 07:14:05,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 07:14:05,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 07:14:05,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:14:05,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 07:14:05,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 07:14:05,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 07:14:05,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 07:14:05,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 07:14:05,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 07:14:05,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 07:14:05,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 07:14:06,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 07:14:06,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 07:14:06,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 07:14:06,307 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 07:14:06,308 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 07:14:06,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label21.c [2020-10-29 07:14:06,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/236186a0c/a692be2b8ad14bd18d94e8f7f72cbdf7/FLAGb085cd92f [2020-10-29 07:14:07,533 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 07:14:07,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label21.c [2020-10-29 07:14:07,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/236186a0c/a692be2b8ad14bd18d94e8f7f72cbdf7/FLAGb085cd92f [2020-10-29 07:14:07,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/236186a0c/a692be2b8ad14bd18d94e8f7f72cbdf7 [2020-10-29 07:14:07,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 07:14:07,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 07:14:07,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 07:14:07,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 07:14:07,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 07:14:07,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:14:07" (1/1) ... [2020-10-29 07:14:07,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a7665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:07, skipping insertion in model container [2020-10-29 07:14:07,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 07:14:07" (1/1) ... [2020-10-29 07:14:08,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 07:14:08,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 07:14:09,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:14:10,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 07:14:10,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 07:14:10,802 INFO L208 MainTranslator]: Completed translation [2020-10-29 07:14:10,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10 WrapperNode [2020-10-29 07:14:10,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 07:14:10,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 07:14:10,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 07:14:10,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 07:14:10,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:10,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:11,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:11,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:11,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... [2020-10-29 07:14:11,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 07:14:11,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 07:14:11,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 07:14:11,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 07:14:11,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 07:14:11,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 07:14:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 07:14:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 07:14:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 07:14:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 07:14:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 07:14:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 07:14:11,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 07:14:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 07:14:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 07:14:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 07:14:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 07:14:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 07:14:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 07:14:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 07:14:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 07:14:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 07:14:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 07:14:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 07:14:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 07:14:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 07:14:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 07:14:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 07:14:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 07:14:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 07:14:21,772 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 07:14:21,772 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 07:14:21,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:14:21 BoogieIcfgContainer [2020-10-29 07:14:21,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 07:14:21,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 07:14:21,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 07:14:21,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 07:14:21,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 07:14:07" (1/3) ... [2020-10-29 07:14:21,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb9d938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:14:21, skipping insertion in model container [2020-10-29 07:14:21,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 07:14:10" (2/3) ... [2020-10-29 07:14:21,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb9d938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 07:14:21, skipping insertion in model container [2020-10-29 07:14:21,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 07:14:21" (3/3) ... [2020-10-29 07:14:21,793 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label21.c [2020-10-29 07:14:21,808 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 07:14:21,816 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 07:14:21,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 07:14:21,889 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 07:14:21,889 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 07:14:21,889 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 07:14:21,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 07:14:21,890 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 07:14:21,890 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 07:14:21,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 07:14:21,890 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 07:14:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-29 07:14:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 07:14:21,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:14:21,959 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] [2020-10-29 07:14:21,960 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:14:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:14:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1753784126, now seen corresponding path program 1 times [2020-10-29 07:14:21,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:14:21,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701151530] [2020-10-29 07:14:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:14:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:22,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:22,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 07:14:22,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:22,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-29 07:14:22,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:22,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:22,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:14:22,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:14:22,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 07:14:22,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 07:14:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:14:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:22,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:22,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:14:22,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:22,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 07:14:22,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:22,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:22,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:14:22,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:14:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:14:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:14:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:14:22,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701151530] [2020-10-29 07:14:22,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:14:22,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 07:14:22,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971779559] [2020-10-29 07:14:22,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 07:14:22,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:14:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 07:14:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 07:14:22,972 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-29 07:14:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:14:41,815 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-29 07:14:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:14:41,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 07:14:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:14:41,869 INFO L225 Difference]: With dead ends: 3157 [2020-10-29 07:14:41,870 INFO L226 Difference]: Without dead ends: 1955 [2020-10-29 07:14:41,886 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 [2020-10-29 07:14:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-29 07:14:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-29 07:14:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-29 07:14:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-29 07:14:42,157 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 27 [2020-10-29 07:14:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:14:42,158 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-29 07:14:42,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 07:14:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-29 07:14:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-29 07:14:42,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:14:42,170 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 07:14:42,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 07:14:42,170 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:14:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:14:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1154706635, now seen corresponding path program 1 times [2020-10-29 07:14:42,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:14:42,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093263118] [2020-10-29 07:14:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:14:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:42,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:42,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:43,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:43,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 07:14:43,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:14:43,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-29 07:14:43,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:43,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:14:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:14:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:14:43,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:14:43,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:14:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:43,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:43,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:43,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:14:43,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 07:14:43,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:43,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:14:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:14:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:14:43,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 07:14:43,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:14:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:14:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:14:44,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:14:44,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 07:14:44,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:14:44,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-29 07:14:44,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:14:44,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:14:44,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:14:44,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:14:44,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 07:14:44,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:14:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:14:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093263118] [2020-10-29 07:14:44,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:14:44,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:14:44,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847715439] [2020-10-29 07:14:44,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:14:44,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:14:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:14:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:14:44,179 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 7 states. [2020-10-29 07:15:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:15:10,521 INFO L93 Difference]: Finished difference Result 5689 states and 9347 transitions. [2020-10-29 07:15:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 07:15:10,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-29 07:15:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:15:10,554 INFO L225 Difference]: With dead ends: 5689 [2020-10-29 07:15:10,555 INFO L226 Difference]: Without dead ends: 3809 [2020-10-29 07:15:10,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:15:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3809 states. [2020-10-29 07:15:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3809 to 3709. [2020-10-29 07:15:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3709 states. [2020-10-29 07:15:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5580 transitions. [2020-10-29 07:15:10,707 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5580 transitions. Word has length 97 [2020-10-29 07:15:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:15:10,707 INFO L481 AbstractCegarLoop]: Abstraction has 3709 states and 5580 transitions. [2020-10-29 07:15:10,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:15:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5580 transitions. [2020-10-29 07:15:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 07:15:10,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:15:10,710 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 07:15:10,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 07:15:10,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:15:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:15:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1044152759, now seen corresponding path program 1 times [2020-10-29 07:15:10,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:15:10,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251822645] [2020-10-29 07:15:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:15:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:10,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:11,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:11,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 07:15:11,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:15:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-29 07:15:11,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:11,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:15:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:15:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 07:15:11,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:15:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:15:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:11,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:11,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:11,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:15:11,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:11,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 07:15:11,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:11,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:11,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:15:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:15:11,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:15:11,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:15:11,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:15:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:11,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:12,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:12,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 07:15:12,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:12,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-29 07:15:12,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:12,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:12,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:15:12,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:15:12,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 07:15:12,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:15:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:15:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251822645] [2020-10-29 07:15:12,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:15:12,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:15:12,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252904509] [2020-10-29 07:15:12,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:15:12,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:15:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:15:12,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:15:12,392 INFO L87 Difference]: Start difference. First operand 3709 states and 5580 transitions. Second operand 7 states. [2020-10-29 07:15:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:15:41,457 INFO L93 Difference]: Finished difference Result 8461 states and 13129 transitions. [2020-10-29 07:15:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:15:41,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-29 07:15:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:15:41,490 INFO L225 Difference]: With dead ends: 8461 [2020-10-29 07:15:41,490 INFO L226 Difference]: Without dead ends: 4758 [2020-10-29 07:15:41,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-29 07:15:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2020-10-29 07:15:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 4551. [2020-10-29 07:15:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4551 states. [2020-10-29 07:15:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 6190 transitions. [2020-10-29 07:15:41,656 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 6190 transitions. Word has length 102 [2020-10-29 07:15:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:15:41,656 INFO L481 AbstractCegarLoop]: Abstraction has 4551 states and 6190 transitions. [2020-10-29 07:15:41,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:15:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 6190 transitions. [2020-10-29 07:15:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-29 07:15:41,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:15:41,659 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 07:15:41,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 07:15:41,659 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:15:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:15:41,660 INFO L82 PathProgramCache]: Analyzing trace with hash -779508179, now seen corresponding path program 1 times [2020-10-29 07:15:41,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:15:41,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578665534] [2020-10-29 07:15:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:15:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:43,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:43,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 07:15:43,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:15:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1427 [2020-10-29 07:15:43,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:43,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:15:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 07:15:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 07:15:43,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:43,318 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:15:43,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:15:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:43,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:43,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:15:43,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 07:15:43,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:43,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:43,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:15:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:15:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 07:15:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:15:43,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:15:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:15:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:15:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:15:43,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:15:43,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:15:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-29 07:15:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:15:43,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:15:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:15:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:15:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 07:15:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 07:15:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:15:43,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578665534] [2020-10-29 07:15:43,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 07:15:43,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 07:15:43,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649706414] [2020-10-29 07:15:43,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:15:43,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:15:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:15:43,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:15:43,838 INFO L87 Difference]: Start difference. First operand 4551 states and 6190 transitions. Second operand 7 states. [2020-10-29 07:15:43,983 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:16:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:11,516 INFO L93 Difference]: Finished difference Result 12099 states and 17017 transitions. [2020-10-29 07:16:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 07:16:11,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-29 07:16:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:11,563 INFO L225 Difference]: With dead ends: 12099 [2020-10-29 07:16:11,564 INFO L226 Difference]: Without dead ends: 7554 [2020-10-29 07:16:11,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 07:16:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7554 states. [2020-10-29 07:16:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7554 to 7265. [2020-10-29 07:16:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7265 states. [2020-10-29 07:16:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7265 states to 7265 states and 9322 transitions. [2020-10-29 07:16:11,803 INFO L78 Accepts]: Start accepts. Automaton has 7265 states and 9322 transitions. Word has length 104 [2020-10-29 07:16:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:11,803 INFO L481 AbstractCegarLoop]: Abstraction has 7265 states and 9322 transitions. [2020-10-29 07:16:11,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:16:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7265 states and 9322 transitions. [2020-10-29 07:16:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-29 07:16:11,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:11,816 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 07:16:11,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 07:16:11,817 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -152377764, now seen corresponding path program 1 times [2020-10-29 07:16:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:11,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630589236] [2020-10-29 07:16:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:11,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:12,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:12,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-29 07:16:12,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:12,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-29 07:16:12,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:12,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:12,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:16:12,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-29 07:16:12,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 07:16:12,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:12,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:12,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:12,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:12,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:12,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:12,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 07:16:12,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:12,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:16:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:12,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:16:12,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:12,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:12,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 07:16:12,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:12,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-29 07:16:12,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:12,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 07:16:12,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 07:16:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 07:16:12,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630589236] [2020-10-29 07:16:12,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:16:12,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:16:12,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700585564] [2020-10-29 07:16:12,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:16:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:16:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:16:12,858 INFO L87 Difference]: Start difference. First operand 7265 states and 9322 transitions. Second operand 5 states. [2020-10-29 07:16:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:16:35,501 INFO L93 Difference]: Finished difference Result 13613 states and 17744 transitions. [2020-10-29 07:16:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:16:35,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-29 07:16:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:16:35,545 INFO L225 Difference]: With dead ends: 13613 [2020-10-29 07:16:35,545 INFO L226 Difference]: Without dead ends: 7157 [2020-10-29 07:16:35,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:16:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2020-10-29 07:16:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7105. [2020-10-29 07:16:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7105 states. [2020-10-29 07:16:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 8483 transitions. [2020-10-29 07:16:35,866 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 8483 transitions. Word has length 156 [2020-10-29 07:16:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:16:35,869 INFO L481 AbstractCegarLoop]: Abstraction has 7105 states and 8483 transitions. [2020-10-29 07:16:35,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:16:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 8483 transitions. [2020-10-29 07:16:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-29 07:16:35,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:16:35,874 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:16:35,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 07:16:35,875 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:16:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:16:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2130951486, now seen corresponding path program 1 times [2020-10-29 07:16:35,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:16:35,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901027458] [2020-10-29 07:16:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:16:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:36,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:40,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:40,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-29 07:16:40,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:16:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4166 [2020-10-29 07:16:40,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:40,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 07:16:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:16:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 07:16:40,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:40,279 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:16:40,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:16:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:40,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:40,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:16:40,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:40,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 07:16:40,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:40,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:16:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:16:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:40,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:16:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:40,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:40,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:16:40,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:16:40,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 07:16:40,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:40,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:16:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:16:40,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:16:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:16:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:16:40,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:16:40,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 07:16:40,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 07:16:40,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-29 07:16:40,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:16:40,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:16:40,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:16:40,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:16:40,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 07:16:40,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:16:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-29 07:16:40,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901027458] [2020-10-29 07:16:40,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:16:40,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 07:16:40,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343422505] [2020-10-29 07:16:40,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 07:16:40,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:16:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 07:16:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 07:16:40,799 INFO L87 Difference]: Start difference. First operand 7105 states and 8483 transitions. Second operand 5 states. [2020-10-29 07:17:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:09,552 INFO L93 Difference]: Finished difference Result 16841 states and 20958 transitions. [2020-10-29 07:17:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 07:17:09,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2020-10-29 07:17:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:09,595 INFO L225 Difference]: With dead ends: 16841 [2020-10-29 07:17:09,595 INFO L226 Difference]: Without dead ends: 10545 [2020-10-29 07:17:09,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 07:17:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10545 states. [2020-10-29 07:17:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10545 to 10513. [2020-10-29 07:17:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10513 states. [2020-10-29 07:17:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 12817 transitions. [2020-10-29 07:17:09,872 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 12817 transitions. Word has length 197 [2020-10-29 07:17:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:09,873 INFO L481 AbstractCegarLoop]: Abstraction has 10513 states and 12817 transitions. [2020-10-29 07:17:09,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 07:17:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 12817 transitions. [2020-10-29 07:17:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-29 07:17:09,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:09,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:09,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 07:17:09,878 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1632965774, now seen corresponding path program 1 times [2020-10-29 07:17:09,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:09,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956149328] [2020-10-29 07:17:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:09,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:10,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:13,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:13,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-29 07:17:13,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 07:17:13,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3939 [2020-10-29 07:17:13,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:13,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-29 07:17:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 07:17:13,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:14,083 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:17:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:14,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:14,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:14,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:14,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 07:17:14,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:14,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:14,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:17:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:14,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:17:14,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:14,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:14,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:14,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 07:17:14,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:14,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-29 07:17:14,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:14,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:14,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 07:17:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 07:17:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:14,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:14,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:14,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 07:17:14,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:14,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-29 07:17:14,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:14,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:14,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:14,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:14,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 07:17:14,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:17:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956149328] [2020-10-29 07:17:14,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:17:14,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:17:14,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802749056] [2020-10-29 07:17:14,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:14,889 INFO L87 Difference]: Start difference. First operand 10513 states and 12817 transitions. Second operand 7 states. [2020-10-29 07:17:15,951 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:17:17,962 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 07:17:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 07:17:49,677 INFO L93 Difference]: Finished difference Result 23991 states and 29912 transitions. [2020-10-29 07:17:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 07:17:49,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 206 [2020-10-29 07:17:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 07:17:49,729 INFO L225 Difference]: With dead ends: 23991 [2020-10-29 07:17:49,729 INFO L226 Difference]: Without dead ends: 14287 [2020-10-29 07:17:49,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-29 07:17:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14287 states. [2020-10-29 07:17:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14287 to 14023. [2020-10-29 07:17:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14023 states. [2020-10-29 07:17:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14023 states to 14023 states and 16876 transitions. [2020-10-29 07:17:50,089 INFO L78 Accepts]: Start accepts. Automaton has 14023 states and 16876 transitions. Word has length 206 [2020-10-29 07:17:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 07:17:50,090 INFO L481 AbstractCegarLoop]: Abstraction has 14023 states and 16876 transitions. [2020-10-29 07:17:50,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 07:17:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 14023 states and 16876 transitions. [2020-10-29 07:17:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-29 07:17:50,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 07:17:50,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 07:17:50,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 07:17:50,095 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 07:17:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 07:17:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1391809689, now seen corresponding path program 1 times [2020-10-29 07:17:50,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 07:17:50,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536774765] [2020-10-29 07:17:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 07:17:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:50,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:51,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:51,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-29 07:17:51,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 07:17:51,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-29 07:17:51,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:51,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:51,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:51,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-29 07:17:51,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 07:17:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 07:17:51,763 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 07:17:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 07:17:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:51,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:51,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 07:17:51,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:51,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 07:17:51,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:51,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:51,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 07:17:51,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:51,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 07:17:51,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:51,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 07:17:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:52,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:52,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-29 07:17:52,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:52,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-29 07:17:52,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:52,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 07:17:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 07:17:52,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 07:17:52,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:52,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 07:17:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 07:17:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 07:17:52,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 07:17:52,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 07:17:52,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 07:17:52,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-29 07:17:52,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 07:17:52,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 07:17:52,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 07:17:52,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 07:17:52,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 07:17:52,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 07:17:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 07:17:52,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536774765] [2020-10-29 07:17:52,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 07:17:52,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 07:17:52,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191099841] [2020-10-29 07:17:52,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 07:17:52,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 07:17:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 07:17:52,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 07:17:52,519 INFO L87 Difference]: Start difference. First operand 14023 states and 16876 transitions. Second operand 7 states. [2020-10-29 07:17:53,840 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 07:17:56,733 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 67