/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/Problem19_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:48:50,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:48:50,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:48:50,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:48:50,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:48:50,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:48:50,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:48:50,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:48:50,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:48:50,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:48:50,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:48:50,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:48:50,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:48:50,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:48:50,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:48:50,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:48:50,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:48:50,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:48:50,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:48:50,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:48:50,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:48:50,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:48:50,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:48:50,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:48:50,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:48:50,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:48:50,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:48:50,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:48:50,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:48:50,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:48:50,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:48:50,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:48:50,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:48:50,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:48:50,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:48:50,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:48:50,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:48:50,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:48:50,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:48:50,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:48:50,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:48:50,834 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 08:48:50,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:48:50,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:48:50,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:48:50,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:48:50,869 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:48:50,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:48:50,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:48:50,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:48:50,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:48:50,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:48:50,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:48:50,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:48:50,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:48:50,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:48:50,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:48:50,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:48:50,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:48:50,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:48:50,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:48:50,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:48:50,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:48:50,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:48:50,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:48:50,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:48:50,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:48:50,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:48:50,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:48:50,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:48:50,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:48:50,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:48:51,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:48:51,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:48:51,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:48:51,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:48:51,343 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:48:51,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2020-10-29 08:48:51,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9e95e493/c215d879e77f4873ab41b6bacab9781a/FLAGd6ba6773a [2020-10-29 08:48:52,790 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:48:52,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2020-10-29 08:48:52,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9e95e493/c215d879e77f4873ab41b6bacab9781a/FLAGd6ba6773a [2020-10-29 08:48:53,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9e95e493/c215d879e77f4873ab41b6bacab9781a [2020-10-29 08:48:53,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:48:53,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:48:53,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:48:53,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:48:53,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:48:53,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:48:53" (1/1) ... [2020-10-29 08:48:53,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187ad513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:53, skipping insertion in model container [2020-10-29 08:48:53,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:48:53" (1/1) ... [2020-10-29 08:48:53,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:48:53,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:48:55,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:48:55,761 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:48:56,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:48:57,000 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:48:57,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57 WrapperNode [2020-10-29 08:48:57,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:48:57,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:48:57,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:48:57,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:48:57,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (1/1) ... [2020-10-29 08:48:57,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:48:57,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:48:57,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:48:57,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:48:57,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (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 08:48:57,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:48:57,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:48:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:48:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:48:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:48:57,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:48:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:48:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:48:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:48:57,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:49:15,370 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:49:15,372 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:49:15,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:49:15 BoogieIcfgContainer [2020-10-29 08:49:15,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:49:15,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:49:15,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:49:15,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:49:15,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:48:53" (1/3) ... [2020-10-29 08:49:15,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa3321f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:49:15, skipping insertion in model container [2020-10-29 08:49:15,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:48:57" (2/3) ... [2020-10-29 08:49:15,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa3321f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:49:15, skipping insertion in model container [2020-10-29 08:49:15,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:49:15" (3/3) ... [2020-10-29 08:49:15,391 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2020-10-29 08:49:15,406 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:49:15,414 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:49:15,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:49:15,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:49:15,484 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:49:15,484 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:49:15,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:49:15,484 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:49:15,484 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:49:15,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:49:15,485 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:49:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:49:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 08:49:15,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:49:15,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:49:15,550 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:49:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:49:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 830926462, now seen corresponding path program 1 times [2020-10-29 08:49:15,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:49:15,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479128218] [2020-10-29 08:49:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:49:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:15,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:16,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:16,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 08:49:16,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:16,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-29 08:49:16,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:16,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:16,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 08:49:16,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:49:16,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:16,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:16,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:16,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:16,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-29 08:49:16,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:16,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:16,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:16,715 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 08:49:16,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479128218] [2020-10-29 08:49:16,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:16,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:49:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820700440] [2020-10-29 08:49:16,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:49:16,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:16,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:49:16,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:49:16,751 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:49:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:49:50,973 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-29 08:49:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:49:50,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 08:49:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:49:51,035 INFO L225 Difference]: With dead ends: 5100 [2020-10-29 08:49:51,035 INFO L226 Difference]: Without dead ends: 3255 [2020-10-29 08:49:51,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 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 08:49:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-29 08:49:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-29 08:49:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-29 08:49:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-29 08:49:51,372 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 33 [2020-10-29 08:49:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:49:51,374 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-29 08:49:51,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:49:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-29 08:49:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 08:49:51,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:49:51,387 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:49:51,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:49:51,389 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:49:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:49:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash -150984762, now seen corresponding path program 1 times [2020-10-29 08:49:51,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:49:51,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533995760] [2020-10-29 08:49:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:49:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:51,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:53,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:53,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:53,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-29 08:49:53,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:49:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-29 08:49:53,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:53,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:53,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:49:53,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:49:53,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:53,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:53,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:53,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:53,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 08:49:53,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:53,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:53,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:53,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:53,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:53,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:49:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:49:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:53,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:53,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:53,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:49:53,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:53,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-29 08:49:53,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:53,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:53,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:49:53,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:49:53,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:49:53,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:49:53,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533995760] [2020-10-29 08:49:53,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:53,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:49:53,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706918327] [2020-10-29 08:49:53,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:49:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:49:53,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:49:53,853 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-29 08:50:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:50:44,389 INFO L93 Difference]: Finished difference Result 9573 states and 15529 transitions. [2020-10-29 08:50:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:50:44,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-29 08:50:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:50:44,427 INFO L225 Difference]: With dead ends: 9573 [2020-10-29 08:50:44,427 INFO L226 Difference]: Without dead ends: 6370 [2020-10-29 08:50:44,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:50:44,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2020-10-29 08:50:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 6277. [2020-10-29 08:50:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6277 states. [2020-10-29 08:50:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 8875 transitions. [2020-10-29 08:50:44,728 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 8875 transitions. Word has length 108 [2020-10-29 08:50:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:50:44,728 INFO L481 AbstractCegarLoop]: Abstraction has 6277 states and 8875 transitions. [2020-10-29 08:50:44,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:50:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 8875 transitions. [2020-10-29 08:50:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-29 08:50:44,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:50:44,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:50:44,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:50:44,732 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:50:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:50:44,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2011438165, now seen corresponding path program 1 times [2020-10-29 08:50:44,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:50:44,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216732899] [2020-10-29 08:50:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:50:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:44,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:44,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:45,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:46,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 08:50:46,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 08:50:46,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1825 [2020-10-29 08:50:46,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:46,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:50:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:50:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 08:50:46,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:50:46,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:50:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:46,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:46,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:50:46,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:50:46,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 08:50:46,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:46,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:50:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:50:46,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:50:46,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:50:46,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:50:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:50:46,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:46,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:50:47,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:50:47,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:50:47,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:50:47,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-29 08:50:47,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:50:47,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:50:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:50:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:50:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:50:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:50:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:50:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216732899] [2020-10-29 08:50:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:50:47,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:50:47,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685892211] [2020-10-29 08:50:47,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:50:47,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:50:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:50:47,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:50:47,442 INFO L87 Difference]: Start difference. First operand 6277 states and 8875 transitions. Second operand 7 states. [2020-10-29 08:51:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:51:40,793 INFO L93 Difference]: Finished difference Result 18726 states and 26960 transitions. [2020-10-29 08:51:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:51:40,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2020-10-29 08:51:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:51:40,868 INFO L225 Difference]: With dead ends: 18726 [2020-10-29 08:51:40,868 INFO L226 Difference]: Without dead ends: 12455 [2020-10-29 08:51:40,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:51:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2020-10-29 08:51:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 12217. [2020-10-29 08:51:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12217 states. [2020-10-29 08:51:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12217 states to 12217 states and 16230 transitions. [2020-10-29 08:51:41,236 INFO L78 Accepts]: Start accepts. Automaton has 12217 states and 16230 transitions. Word has length 119 [2020-10-29 08:51:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:51:41,240 INFO L481 AbstractCegarLoop]: Abstraction has 12217 states and 16230 transitions. [2020-10-29 08:51:41,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:51:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12217 states and 16230 transitions. [2020-10-29 08:51:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-29 08:51:41,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:51:41,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:41,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:51:41,253 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:51:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:51:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash 764009428, now seen corresponding path program 1 times [2020-10-29 08:51:41,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:51:41,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422053088] [2020-10-29 08:51:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:51:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:41,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:41,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:42,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:42,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:42,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-29 08:51:42,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:51:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-29 08:51:42,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:42,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:51:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:51:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 08:51:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:42,954 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:51:42,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:51:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:42,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:42,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:42,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:51:42,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:51:42,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 08:51:42,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:42,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:51:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:51:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:51:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:43,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:51:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:51:43,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:43,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:51:43,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:51:43,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:51:43,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:51:43,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-29 08:51:43,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:51:43,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:51:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:51:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:51:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 08:51:43,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:51:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:51:43,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422053088] [2020-10-29 08:51:43,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:51:43,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:51:43,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603743226] [2020-10-29 08:51:43,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:51:43,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:51:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:51:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:51:43,499 INFO L87 Difference]: Start difference. First operand 12217 states and 16230 transitions. Second operand 7 states. [2020-10-29 08:51:43,671 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:51:51,263 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68