/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:16:00,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:16:00,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:16:00,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:16:00,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:16:00,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:16:00,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:16:00,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:16:00,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:16:00,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:16:00,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:16:00,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:16:00,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:16:00,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:16:00,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:16:00,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:16:00,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:16:00,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:16:00,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:16:00,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:16:00,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:16:00,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:16:00,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:16:00,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:16:00,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:16:00,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:16:00,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:16:00,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:16:00,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:16:00,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:16:00,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:16:00,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:16:00,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:16:00,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:16:00,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:16:00,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:16:00,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:16:00,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:16:00,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:16:00,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:16:00,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:16:00,920 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:16:00,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:16:00,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:16:00,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:16:00,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:16:00,954 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:16:00,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:16:00,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:16:00,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:16:00,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:16:00,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:16:00,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:16:00,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:16:00,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:16:00,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:16:00,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:16:00,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:16:00,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:16:00,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:16:00,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:16:00,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:16:00,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:16:00,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:16:00,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:16:00,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:16:00,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:16:00,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:16:00,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:16:00,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:16:00,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:16:00,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:16:01,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:16:01,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:16:01,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:16:01,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:16:01,385 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:16:01,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-28 14:16:01,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26f2691e7/70eba967683542038f58655cc4fdcdb8/FLAG93fc3d3b4 [2020-10-28 14:16:02,703 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:16:02,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label51.c [2020-10-28 14:16:02,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26f2691e7/70eba967683542038f58655cc4fdcdb8/FLAG93fc3d3b4 [2020-10-28 14:16:03,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26f2691e7/70eba967683542038f58655cc4fdcdb8 [2020-10-28 14:16:03,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:16:03,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:16:03,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:16:03,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:16:03,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:16:03,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:16:03" (1/1) ... [2020-10-28 14:16:03,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f613617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:03, skipping insertion in model container [2020-10-28 14:16:03,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:16:03" (1/1) ... [2020-10-28 14:16:03,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:16:03,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:16:05,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:16:05,419 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:16:06,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:16:06,680 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:16:06,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06 WrapperNode [2020-10-28 14:16:06,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:16:06,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:16:06,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:16:06,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:16:06,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:06,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:06,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:06,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:07,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:07,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:07,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... [2020-10-28 14:16:07,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:16:07,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:16:07,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:16:07,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:16:07,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:16:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:16:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:16:07,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:16:07,565 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:16:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:16:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:16:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:16:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:16:07,567 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:16:07,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:16:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:16:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:16:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:16:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:16:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:16:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:16:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:16:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:16:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:16:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:16:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:16:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:16:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:16:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:16:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:16:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:16:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:16:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:16:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:16:21,987 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:16:21,988 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:16:21,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:16:21 BoogieIcfgContainer [2020-10-28 14:16:21,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:16:22,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:16:22,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:16:22,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:16:22,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:16:03" (1/3) ... [2020-10-28 14:16:22,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad5882f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:16:22, skipping insertion in model container [2020-10-28 14:16:22,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:16:06" (2/3) ... [2020-10-28 14:16:22,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad5882f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:16:22, skipping insertion in model container [2020-10-28 14:16:22,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:16:21" (3/3) ... [2020-10-28 14:16:22,009 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label51.c [2020-10-28 14:16:22,023 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:16:22,030 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:16:22,043 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:16:22,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:16:22,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:16:22,087 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:16:22,087 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:16:22,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:16:22,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:16:22,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:16:22,088 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:16:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:16:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:16:22,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:22,168 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] [2020-10-28 14:16:22,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2072453099, now seen corresponding path program 1 times [2020-10-28 14:16:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206760676] [2020-10-28 14:16:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:23,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:23,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:16:23,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:23,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-28 14:16:23,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:23,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:23,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:23,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:16:23,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:16:23,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:23,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:23,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:23,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:23,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:23,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 14:16:23,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:23,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:16:23,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206760676] [2020-10-28 14:16:23,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:23,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:16:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006966975] [2020-10-28 14:16:23,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:16:23,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:23,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:16:23,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:16:23,336 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:16:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:16:56,603 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-28 14:16:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:16:56,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-28 14:16:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:16:56,661 INFO L225 Difference]: With dead ends: 5100 [2020-10-28 14:16:56,662 INFO L226 Difference]: Without dead ends: 3255 [2020-10-28 14:16:56,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:16:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-28 14:16:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-28 14:16:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-28 14:16:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-28 14:16:56,957 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 24 [2020-10-28 14:16:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:16:56,958 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-28 14:16:56,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:16:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-28 14:16:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 14:16:56,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:56,964 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:16:56,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:16:56,965 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1619879660, now seen corresponding path program 1 times [2020-10-28 14:16:56,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:56,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623459461] [2020-10-28 14:16:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:58,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:58,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:16:58,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:16:58,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-28 14:16:58,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:58,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:58,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:16:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:16:58,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:58,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:58,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:58,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:16:58,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:58,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:58,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:58,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:58,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:16:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:16:59,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:59,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-28 14:16:59,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:16:59,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:16:59,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:16:59,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:16:59,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623459461] [2020-10-28 14:16:59,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:59,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:16:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338899785] [2020-10-28 14:16:59,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:16:59,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:16:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:16:59,104 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-28 14:17:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:17:49,136 INFO L93 Difference]: Finished difference Result 9449 states and 15356 transitions. [2020-10-28 14:17:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:17:49,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-28 14:17:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:17:49,179 INFO L225 Difference]: With dead ends: 9449 [2020-10-28 14:17:49,179 INFO L226 Difference]: Without dead ends: 6246 [2020-10-28 14:17:49,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:17:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2020-10-28 14:17:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 6146. [2020-10-28 14:17:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6146 states. [2020-10-28 14:17:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 8623 transitions. [2020-10-28 14:17:49,477 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 8623 transitions. Word has length 99 [2020-10-28 14:17:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:17:49,478 INFO L481 AbstractCegarLoop]: Abstraction has 6146 states and 8623 transitions. [2020-10-28 14:17:49,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:17:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 8623 transitions. [2020-10-28 14:17:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 14:17:49,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:17:49,481 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:17:49,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:17:49,482 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:17:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:17:49,483 INFO L82 PathProgramCache]: Analyzing trace with hash -849017814, now seen corresponding path program 1 times [2020-10-28 14:17:49,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:17:49,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846825013] [2020-10-28 14:17:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:17:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:49,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:49,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:50,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:51,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:51,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 14:17:51,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:17:51,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-28 14:17:51,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:51,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:17:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:17:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:17:51,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:17:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:17:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:51,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:51,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:17:51,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 14:17:51,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:51,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:17:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:17:51,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:17:51,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:17:51,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:17:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:51,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:51,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:17:51,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 14:17:51,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:51,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:51,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:17:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:17:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:17:51,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:17:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:17:51,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846825013] [2020-10-28 14:17:51,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:17:51,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:17:51,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213385576] [2020-10-28 14:17:51,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:17:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:17:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:17:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:17:51,732 INFO L87 Difference]: Start difference. First operand 6146 states and 8623 transitions. Second operand 7 states. [2020-10-28 14:18:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:18:57,995 INFO L93 Difference]: Finished difference Result 18717 states and 26694 transitions. [2020-10-28 14:18:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:18:57,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-10-28 14:18:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:18:58,085 INFO L225 Difference]: With dead ends: 18717 [2020-10-28 14:18:58,087 INFO L226 Difference]: Without dead ends: 12577 [2020-10-28 14:18:58,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:18:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12577 states. [2020-10-28 14:18:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12577 to 12324. [2020-10-28 14:18:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12324 states. [2020-10-28 14:18:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12324 states to 12324 states and 15883 transitions. [2020-10-28 14:18:58,683 INFO L78 Accepts]: Start accepts. Automaton has 12324 states and 15883 transitions. Word has length 125 [2020-10-28 14:18:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:18:58,684 INFO L481 AbstractCegarLoop]: Abstraction has 12324 states and 15883 transitions. [2020-10-28 14:18:58,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:18:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 12324 states and 15883 transitions. [2020-10-28 14:18:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 14:18:58,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:18:58,704 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:18:58,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:18:58,704 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:18:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:18:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1723862754, now seen corresponding path program 1 times [2020-10-28 14:18:58,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:18:58,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923254666] [2020-10-28 14:18:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:18:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:58,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:59,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:00,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:00,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 14:19:00,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:19:00,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1942 [2020-10-28 14:19:00,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:00,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:19:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-28 14:19:00,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:19:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:19:00,883 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:19:00,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:19:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:00,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:00,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:00,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:19:00,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:00,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:19:00,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:00,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:00,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:19:00,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:19:00,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:19:00,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:19:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:19:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:01,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:01,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 14:19:01,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:01,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-28 14:19:01,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:01,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:01,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:19:01,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 14:19:01,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:19:01,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:19:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:19:01,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923254666] [2020-10-28 14:19:01,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:19:01,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:19:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847471958] [2020-10-28 14:19:01,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:19:01,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:19:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:19:01,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:19:01,239 INFO L87 Difference]: Start difference. First operand 12324 states and 15883 transitions. Second operand 5 states. [2020-10-28 14:19:01,508 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:19:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:19:52,679 INFO L93 Difference]: Finished difference Result 36210 states and 47959 transitions. [2020-10-28 14:19:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:19:52,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-28 14:19:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:19:52,775 INFO L225 Difference]: With dead ends: 36210 [2020-10-28 14:19:52,775 INFO L226 Difference]: Without dead ends: 23892 [2020-10-28 14:19:52,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:19:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23892 states. [2020-10-28 14:19:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23892 to 23856. [2020-10-28 14:19:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23856 states. [2020-10-28 14:19:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23856 states to 23856 states and 30978 transitions. [2020-10-28 14:19:53,422 INFO L78 Accepts]: Start accepts. Automaton has 23856 states and 30978 transitions. Word has length 147 [2020-10-28 14:19:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:19:53,424 INFO L481 AbstractCegarLoop]: Abstraction has 23856 states and 30978 transitions. [2020-10-28 14:19:53,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:19:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23856 states and 30978 transitions. [2020-10-28 14:19:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-28 14:19:53,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:19:53,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:19:53,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:19:53,431 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:19:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:19:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1372510820, now seen corresponding path program 1 times [2020-10-28 14:19:53,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:19:53,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285511444] [2020-10-28 14:19:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:19:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:54,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:54,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-28 14:19:54,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:19:54,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-28 14:19:54,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:54,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:19:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:19:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 14:19:54,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:19:55,027 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:19:55,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:19:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:55,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:55,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:55,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:19:55,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:55,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:19:55,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:55,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:55,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:19:55,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:19:55,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:19:55,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:19:55,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:19:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:19:55,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:19:55,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:19:55,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 14:19:55,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:19:55,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-28 14:19:55,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:19:55,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:19:55,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:19:55,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:19:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-28 14:19:55,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:19:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:19:55,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285511444] [2020-10-28 14:19:55,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:19:55,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:19:55,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114561542] [2020-10-28 14:19:55,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:19:55,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:19:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:19:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:19:55,605 INFO L87 Difference]: Start difference. First operand 23856 states and 30978 transitions. Second operand 7 states. [2020-10-28 14:19:55,767 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:19:57,841 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68