/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:51:36,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:51:36,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:51:36,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:51:36,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:51:36,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:51:36,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:51:36,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:51:36,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:51:36,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:51:36,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:51:36,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:51:36,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:51:36,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:51:36,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:51:36,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:51:36,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:51:36,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:51:36,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:51:36,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:51:36,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:51:36,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:51:36,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:51:36,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:51:36,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:51:36,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:51:36,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:51:36,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:51:36,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:51:36,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:51:36,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:51:36,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:51:36,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:51:36,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:51:36,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:51:36,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:51:36,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:51:36,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:51:36,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:51:36,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:51:36,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:51:36,895 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 [2020-10-27 00:51:36,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:51:36,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:51:36,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:51:36,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:51:36,958 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:51:36,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:51:36,958 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:51:36,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:51:36,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:51:36,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:51:36,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:51:36,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:51:36,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:51:36,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:51:36,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:51:36,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:51:36,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:51:36,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:51:36,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:51:36,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:51:36,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:51:36,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:51:36,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:51:36,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:51:36,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:51:36,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:51:36,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:51:36,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:51:36,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:51:36,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:51:37,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:51:37,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:51:37,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:51:37,434 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:51:37,435 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:51:37,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label49.c [2020-10-27 00:51:37,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639f6fe61/b56ca28461a5407ea43e0694e2d35237/FLAGeb58cb67d [2020-10-27 00:51:38,860 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:51:38,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label49.c [2020-10-27 00:51:38,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639f6fe61/b56ca28461a5407ea43e0694e2d35237/FLAGeb58cb67d [2020-10-27 00:51:39,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639f6fe61/b56ca28461a5407ea43e0694e2d35237 [2020-10-27 00:51:39,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:51:39,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:51:39,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:51:39,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:51:39,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:51:39,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:51:39" (1/1) ... [2020-10-27 00:51:39,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dc0707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:39, skipping insertion in model container [2020-10-27 00:51:39,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:51:39" (1/1) ... [2020-10-27 00:51:39,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:51:39,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:51:41,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:51:41,640 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:51:42,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:51:42,922 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:51:42,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42 WrapperNode [2020-10-27 00:51:42,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:51:42,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:51:42,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:51:42,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:51:42,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:42,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:43,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:43,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:43,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:43,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:43,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (1/1) ... [2020-10-27 00:51:43,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:51:43,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:51:43,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:51:43,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:51:43,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (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 [2020-10-27 00:51:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:51:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:51:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:51:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:51:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:51:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:51:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:51:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:51:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:51:43,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:51:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:51:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:51:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:51:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:51:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:51:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:51:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:51:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:51:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:51:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:51:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:51:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:51:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:51:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:51:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:51:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:51:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:51:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:51:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:51:57,756 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:51:57,757 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:51:57,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:57 BoogieIcfgContainer [2020-10-27 00:51:57,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:51:57,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:51:57,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:51:57,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:51:57,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:51:39" (1/3) ... [2020-10-27 00:51:57,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbb3065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:51:57, skipping insertion in model container [2020-10-27 00:51:57,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:42" (2/3) ... [2020-10-27 00:51:57,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbb3065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:51:57, skipping insertion in model container [2020-10-27 00:51:57,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:57" (3/3) ... [2020-10-27 00:51:57,780 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label49.c [2020-10-27 00:51:57,797 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:51:57,805 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:51:57,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:51:57,891 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:51:57,891 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:51:57,891 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:51:57,892 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:51:57,892 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:51:57,892 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:51:57,892 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:51:57,892 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:51:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:51:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 00:51:57,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:57,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:51:57,987 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2083495358, now seen corresponding path program 1 times [2020-10-27 00:51:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:58,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493165172] [2020-10-27 00:51:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:58,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:59,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:59,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 00:51:59,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:59,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 00:51:59,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 00:51:59,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:51:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:59,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:59,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:59,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:59,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 00:51:59,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:59,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:51:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:51:59,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493165172] [2020-10-27 00:51:59,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:59,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:51:59,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802122134] [2020-10-27 00:51:59,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:51:59,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:59,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:51:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:51:59,618 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:52:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:52:31,996 INFO L93 Difference]: Finished difference Result 5092 states and 9568 transitions. [2020-10-27 00:52:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:52:32,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-27 00:52:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:52:32,059 INFO L225 Difference]: With dead ends: 5092 [2020-10-27 00:52:32,060 INFO L226 Difference]: Without dead ends: 3247 [2020-10-27 00:52:32,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:52:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-10-27 00:52:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3180. [2020-10-27 00:52:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3180 states. [2020-10-27 00:52:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5851 transitions. [2020-10-27 00:52:32,380 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5851 transitions. Word has length 49 [2020-10-27 00:52:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:52:32,383 INFO L481 AbstractCegarLoop]: Abstraction has 3180 states and 5851 transitions. [2020-10-27 00:52:32,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:52:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5851 transitions. [2020-10-27 00:52:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 00:52:32,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:32,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:52:32,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:52:32,405 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1915754128, now seen corresponding path program 1 times [2020-10-27 00:52:32,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:32,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952355463] [2020-10-27 00:52:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:32,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:32,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:32,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:33,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:33,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 00:52:33,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:52:33,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-10-27 00:52:33,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:33,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:52:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:52:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:52:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:52:33,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:52:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:33,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:33,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:33,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:52:33,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:33,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:52:33,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:52:33,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:52:33,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:52:33,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:34,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:52:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:34,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:34,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:34,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:52:34,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:52:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 00:52:34,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:52:34,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:52:34,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:52:34,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:52:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:52:34,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952355463] [2020-10-27 00:52:34,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:52:34,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:52:34,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063327066] [2020-10-27 00:52:34,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:52:34,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:52:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:52:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:52:34,386 INFO L87 Difference]: Start difference. First operand 3180 states and 5851 transitions. Second operand 7 states. [2020-10-27 00:53:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:53:21,916 INFO L93 Difference]: Finished difference Result 9552 states and 17696 transitions. [2020-10-27 00:53:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:53:21,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-10-27 00:53:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:53:21,964 INFO L225 Difference]: With dead ends: 9552 [2020-10-27 00:53:21,964 INFO L226 Difference]: Without dead ends: 6378 [2020-10-27 00:53:21,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:53:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6378 states. [2020-10-27 00:53:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6378 to 6233. [2020-10-27 00:53:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6233 states. [2020-10-27 00:53:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 9738 transitions. [2020-10-27 00:53:22,243 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 9738 transitions. Word has length 120 [2020-10-27 00:53:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:53:22,246 INFO L481 AbstractCegarLoop]: Abstraction has 6233 states and 9738 transitions. [2020-10-27 00:53:22,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:53:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 9738 transitions. [2020-10-27 00:53:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 00:53:22,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:53:22,253 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, 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] [2020-10-27 00:53:22,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:53:22,253 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:53:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:53:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1492930491, now seen corresponding path program 1 times [2020-10-27 00:53:22,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:53:22,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203235275] [2020-10-27 00:53:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:53:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:22,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:22,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:23,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:24,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:24,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 00:53:24,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:53:24,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2095 [2020-10-27 00:53:24,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:53:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:53:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 00:53:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:53:24,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:53:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:24,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:24,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:53:24,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:24,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:53:24,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:53:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:53:24,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:53:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:24,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:53:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:24,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:24,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:24,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:53:24,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:24,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 00:53:24,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:53:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:53:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:53:24,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:53:25,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203235275] [2020-10-27 00:53:25,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:53:25,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:53:25,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522201112] [2020-10-27 00:53:25,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:53:25,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:53:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:53:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:53:25,074 INFO L87 Difference]: Start difference. First operand 6233 states and 9738 transitions. Second operand 7 states. [2020-10-27 00:54:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:10,070 INFO L93 Difference]: Finished difference Result 15732 states and 24688 transitions. [2020-10-27 00:54:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:54:10,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2020-10-27 00:54:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:10,117 INFO L225 Difference]: With dead ends: 15732 [2020-10-27 00:54:10,117 INFO L226 Difference]: Without dead ends: 9505 [2020-10-27 00:54:10,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:54:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9505 states. [2020-10-27 00:54:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9505 to 9301. [2020-10-27 00:54:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9301 states. [2020-10-27 00:54:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 13650 transitions. [2020-10-27 00:54:10,394 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 13650 transitions. Word has length 127 [2020-10-27 00:54:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:10,403 INFO L481 AbstractCegarLoop]: Abstraction has 9301 states and 13650 transitions. [2020-10-27 00:54:10,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:54:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 13650 transitions. [2020-10-27 00:54:10,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 00:54:10,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:10,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:54:10,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:54:10,408 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1534034515, now seen corresponding path program 1 times [2020-10-27 00:54:10,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:10,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253776729] [2020-10-27 00:54:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:10,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:12,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:12,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:12,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2415 [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 00:54:12,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:13,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:13,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:13,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:13,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:13,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:13,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:54:13,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:13,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:13,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:13,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:13,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:13,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:13,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:13,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:13,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:54:13,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 00:54:13,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:54:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:54:13,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253776729] [2020-10-27 00:54:13,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:54:13,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:54:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64815057] [2020-10-27 00:54:13,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:13,348 INFO L87 Difference]: Start difference. First operand 9301 states and 13650 transitions. Second operand 7 states. [2020-10-27 00:55:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:55:04,036 INFO L93 Difference]: Finished difference Result 23640 states and 36297 transitions. [2020-10-27 00:55:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:55:04,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-27 00:55:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:55:04,113 INFO L225 Difference]: With dead ends: 23640 [2020-10-27 00:55:04,113 INFO L226 Difference]: Without dead ends: 14345 [2020-10-27 00:55:04,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:55:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14345 states. [2020-10-27 00:55:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14345 to 13676. [2020-10-27 00:55:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13676 states. [2020-10-27 00:55:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13676 states to 13676 states and 20009 transitions. [2020-10-27 00:55:04,629 INFO L78 Accepts]: Start accepts. Automaton has 13676 states and 20009 transitions. Word has length 135 [2020-10-27 00:55:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:55:04,631 INFO L481 AbstractCegarLoop]: Abstraction has 13676 states and 20009 transitions. [2020-10-27 00:55:04,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:55:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13676 states and 20009 transitions. [2020-10-27 00:55:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-27 00:55:04,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:55:04,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:55:04,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:55:04,635 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:55:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:55:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash 412951969, now seen corresponding path program 1 times [2020-10-27 00:55:04,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:55:04,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265507106] [2020-10-27 00:55:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:55:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:04,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:05,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:06,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:06,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 00:55:06,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:55:06,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-27 00:55:06,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:06,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:55:06,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:55:06,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 00:55:06,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:06,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:55:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:06,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:06,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:55:06,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:06,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:55:06,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:06,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:55:06,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:55:06,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:55:06,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:55:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:55:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:55:06,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:55:07,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:55:07,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:55:07,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:55:07,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 00:55:07,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:55:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:55:07,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:55:07,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 00:55:07,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:55:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:55:07,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265507106] [2020-10-27 00:55:07,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:55:07,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:55:07,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920215442] [2020-10-27 00:55:07,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:55:07,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:55:07,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:55:07,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:55:07,193 INFO L87 Difference]: Start difference. First operand 13676 states and 20009 transitions. Second operand 7 states. [2020-10-27 00:55:07,347 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66