/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/Problem05_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:38:16,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:38:16,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:38:16,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:38:16,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:38:16,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:38:16,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:38:16,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:38:16,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:38:16,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:38:16,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:38:16,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:38:16,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:38:16,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:38:16,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:38:16,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:38:16,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:38:16,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:38:16,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:38:16,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:38:16,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:38:16,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:38:16,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:38:16,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:38:16,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:38:16,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:38:16,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:38:16,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:38:16,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:38:16,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:38:16,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:38:16,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:38:16,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:38:16,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:38:16,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:38:16,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:38:16,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:38:16,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:38:16,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:38:16,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:38:16,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:38:16,999 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 10:38:17,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:38:17,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:38:17,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:38:17,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:38:17,065 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:38:17,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:38:17,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:38:17,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:38:17,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:38:17,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:38:17,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:38:17,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:38:17,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:38:17,069 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:38:17,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:38:17,070 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:38:17,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:38:17,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:38:17,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:38:17,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:38:17,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:38:17,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:38:17,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:38:17,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:38:17,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:38:17,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:38:17,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:38:17,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:38:17,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:38:17,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:38:17,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:38:17,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:38:17,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:38:17,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:38:17,518 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:38:17,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label00.c [2020-10-28 10:38:17,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2dc72072/cf8f18df8eb74aaca1e10be46eb7b8bd/FLAGb6ebaf4b5 [2020-10-28 10:38:18,767 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:38:18,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label00.c [2020-10-28 10:38:18,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2dc72072/cf8f18df8eb74aaca1e10be46eb7b8bd/FLAGb6ebaf4b5 [2020-10-28 10:38:19,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2dc72072/cf8f18df8eb74aaca1e10be46eb7b8bd [2020-10-28 10:38:19,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:38:19,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:38:19,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:38:19,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:38:19,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:38:19,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:38:19" (1/1) ... [2020-10-28 10:38:19,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777279dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:19, skipping insertion in model container [2020-10-28 10:38:19,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:38:19" (1/1) ... [2020-10-28 10:38:19,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:38:19,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:38:21,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:38:21,714 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:38:23,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:38:23,337 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:38:23,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23 WrapperNode [2020-10-28 10:38:23,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:38:23,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:38:23,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:38:23,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:38:23,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (1/1) ... [2020-10-28 10:38:23,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:38:23,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:38:23,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:38:23,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:38:23,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (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 10:38:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:38:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:38:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:38:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:38:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:38:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:38:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:38:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:38:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 10:38:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-28 10:38:23,975 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-28 10:38:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:38:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:38:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:38:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:38:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:38:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:38:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 10:38:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-28 10:38:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-28 10:38:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:38:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:38:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:38:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:38:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:38:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:38:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:38:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:38:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:38:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:38:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:38:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:38:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:38:34,277 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:38:34,277 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:38:34,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:38:34 BoogieIcfgContainer [2020-10-28 10:38:34,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:38:34,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:38:34,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:38:34,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:38:34,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:38:19" (1/3) ... [2020-10-28 10:38:34,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b349399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:38:34, skipping insertion in model container [2020-10-28 10:38:34,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:38:23" (2/3) ... [2020-10-28 10:38:34,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b349399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:38:34, skipping insertion in model container [2020-10-28 10:38:34,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:38:34" (3/3) ... [2020-10-28 10:38:34,296 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label00.c [2020-10-28 10:38:34,309 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:38:34,319 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:38:34,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:38:34,384 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:38:34,385 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:38:34,385 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:38:34,385 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:38:34,385 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:38:34,385 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:38:34,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:38:34,386 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:38:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-28 10:38:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1654 [2020-10-28 10:38:34,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:38:34,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:38:34,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:38:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:38:34,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1102237815, now seen corresponding path program 1 times [2020-10-28 10:38:34,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:38:34,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287342857] [2020-10-28 10:38:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:38:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:40,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:40,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1677 [2020-10-28 10:38:40,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:40,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-28 10:38:40,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:40,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 10:38:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:38:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1668 [2020-10-28 10:38:40,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:38:43,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:38:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:38:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:38:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:38:43,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:38:43,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:38:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:38:43,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:38:43,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:38:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:38:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:38:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:38:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:38:46,133 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 10:38:46,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287342857] [2020-10-28 10:38:46,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:38:46,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:38:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279391832] [2020-10-28 10:38:46,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:38:46,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:38:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:38:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:38:46,161 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-28 10:39:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:07,230 INFO L93 Difference]: Finished difference Result 6315 states and 11856 transitions. [2020-10-28 10:39:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:39:07,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1653 [2020-10-28 10:39:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:07,298 INFO L225 Difference]: With dead ends: 6315 [2020-10-28 10:39:07,299 INFO L226 Difference]: Without dead ends: 4025 [2020-10-28 10:39:07,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:39:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2020-10-28 10:39:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3998. [2020-10-28 10:39:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2020-10-28 10:39:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6428 transitions. [2020-10-28 10:39:07,577 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6428 transitions. Word has length 1653 [2020-10-28 10:39:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:07,584 INFO L481 AbstractCegarLoop]: Abstraction has 3998 states and 6428 transitions. [2020-10-28 10:39:07,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:39:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6428 transitions. [2020-10-28 10:39:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1663 [2020-10-28 10:39:07,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:07,720 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:39:07,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:39:07,721 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:07,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1393795315, now seen corresponding path program 1 times [2020-10-28 10:39:07,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:07,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332556724] [2020-10-28 10:39:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:07,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:10,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:12,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:12,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1688 [2020-10-28 10:39:12,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:12,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 10:39:12,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:12,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:12,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:39:12,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:39:12,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:39:12,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:39:14,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:14,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:14,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:14,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:14,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:14,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:39:14,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:14,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:14,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:14,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:39:14,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:39:14,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:14,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:14,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:14,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:39:14,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:14,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:39:14,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:14,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:14,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:14,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:14,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:39:14,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:39:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332556724] [2020-10-28 10:39:15,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:39:15,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:39:15,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552059992] [2020-10-28 10:39:15,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:39:15,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:39:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:39:15,283 INFO L87 Difference]: Start difference. First operand 3998 states and 6428 transitions. Second operand 7 states. [2020-10-28 10:39:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:39:42,426 INFO L93 Difference]: Finished difference Result 11834 states and 19174 transitions. [2020-10-28 10:39:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:39:42,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1662 [2020-10-28 10:39:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:39:42,481 INFO L225 Difference]: With dead ends: 11834 [2020-10-28 10:39:42,481 INFO L226 Difference]: Without dead ends: 7842 [2020-10-28 10:39:42,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:39:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-10-28 10:39:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7662. [2020-10-28 10:39:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7662 states. [2020-10-28 10:39:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7662 states to 7662 states and 11092 transitions. [2020-10-28 10:39:42,738 INFO L78 Accepts]: Start accepts. Automaton has 7662 states and 11092 transitions. Word has length 1662 [2020-10-28 10:39:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:39:42,739 INFO L481 AbstractCegarLoop]: Abstraction has 7662 states and 11092 transitions. [2020-10-28 10:39:42,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:39:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7662 states and 11092 transitions. [2020-10-28 10:39:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1665 [2020-10-28 10:39:42,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:39:42,942 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:39:42,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:39:42,942 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:39:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:39:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1394836881, now seen corresponding path program 1 times [2020-10-28 10:39:42,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:39:42,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193109620] [2020-10-28 10:39:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:39:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:43,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:48,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:48,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1690 [2020-10-28 10:39:48,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:39:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-28 10:39:48,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:48,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:39:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:39:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:39:48,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:39:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:48,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:48,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:39:48,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:48,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:39:48,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:48,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:48,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:39:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:39:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:39:48,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:48,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:39:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:39:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:39:48,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:39:48,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:39:48,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:39:48,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:39:48,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:39:48,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:39:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:39:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:39:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:39:48,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:39:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:39:50,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193109620] [2020-10-28 10:39:50,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:39:50,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:39:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592582508] [2020-10-28 10:39:50,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:39:50,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:39:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:39:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:39:50,560 INFO L87 Difference]: Start difference. First operand 7662 states and 11092 transitions. Second operand 7 states. [2020-10-28 10:40:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:40:15,885 INFO L93 Difference]: Finished difference Result 19474 states and 27745 transitions. [2020-10-28 10:40:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:40:15,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1664 [2020-10-28 10:40:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:40:15,961 INFO L225 Difference]: With dead ends: 19474 [2020-10-28 10:40:15,961 INFO L226 Difference]: Without dead ends: 11818 [2020-10-28 10:40:15,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:40:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11818 states. [2020-10-28 10:40:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11818 to 11655. [2020-10-28 10:40:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11655 states. [2020-10-28 10:40:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11655 states to 11655 states and 15835 transitions. [2020-10-28 10:40:16,342 INFO L78 Accepts]: Start accepts. Automaton has 11655 states and 15835 transitions. Word has length 1664 [2020-10-28 10:40:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:40:16,343 INFO L481 AbstractCegarLoop]: Abstraction has 11655 states and 15835 transitions. [2020-10-28 10:40:16,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:40:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 11655 states and 15835 transitions. [2020-10-28 10:40:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2020-10-28 10:40:16,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:16,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:40:16,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:40:16,412 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -202665048, now seen corresponding path program 1 times [2020-10-28 10:40:16,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:16,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511647267] [2020-10-28 10:40:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:17,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:17,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:18,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:21,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:21,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1701 [2020-10-28 10:40:21,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:40:21,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-28 10:40:21,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:21,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:40:21,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:40:21,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 10:40:21,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:22,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:40:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:22,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:22,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:40:22,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:22,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:40:22,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:22,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:40:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:40:22,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:40:22,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:40:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:22,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:40:22,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:40:22,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 10:40:22,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:40:22,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:40:22,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:40:22,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:40:22,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:40:22,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:40:22,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 10:40:22,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:40:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:40:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511647267] [2020-10-28 10:40:23,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:40:23,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 10:40:23,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374842141] [2020-10-28 10:40:23,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:40:23,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:40:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:40:23,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:40:23,852 INFO L87 Difference]: Start difference. First operand 11655 states and 15835 transitions. Second operand 8 states. [2020-10-28 10:41:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:41:05,371 INFO L93 Difference]: Finished difference Result 46422 states and 67201 transitions. [2020-10-28 10:41:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 10:41:05,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1675 [2020-10-28 10:41:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:41:05,516 INFO L225 Difference]: With dead ends: 46422 [2020-10-28 10:41:05,516 INFO L226 Difference]: Without dead ends: 34773 [2020-10-28 10:41:05,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:41:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34773 states. [2020-10-28 10:41:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34773 to 34444. [2020-10-28 10:41:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34444 states. [2020-10-28 10:41:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34444 states to 34444 states and 46690 transitions. [2020-10-28 10:41:06,518 INFO L78 Accepts]: Start accepts. Automaton has 34444 states and 46690 transitions. Word has length 1675 [2020-10-28 10:41:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:41:06,519 INFO L481 AbstractCegarLoop]: Abstraction has 34444 states and 46690 transitions. [2020-10-28 10:41:06,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:41:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 34444 states and 46690 transitions. [2020-10-28 10:41:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-10-28 10:41:06,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:41:06,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:06,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:41:06,666 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:41:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:41:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash 261174643, now seen corresponding path program 1 times [2020-10-28 10:41:06,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:41:06,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563067767] [2020-10-28 10:41:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:41:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:08,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:11,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:11,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1716 [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5145 [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:41:11,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 10:41:11,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:12,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:41:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:12,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:12,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:12,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:41:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:12,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:41:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:12,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:12,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:12,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 10:41:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:41:13,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563067767] [2020-10-28 10:41:13,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:41:13,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:41:13,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014989858] [2020-10-28 10:41:13,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:41:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:41:13,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:41:13,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:41:13,789 INFO L87 Difference]: Start difference. First operand 34444 states and 46690 transitions. Second operand 7 states. [2020-10-28 10:41:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:41:42,862 INFO L93 Difference]: Finished difference Result 103427 states and 150697 transitions. [2020-10-28 10:41:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:41:42,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1690 [2020-10-28 10:41:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:41:43,140 INFO L225 Difference]: With dead ends: 103427 [2020-10-28 10:41:43,140 INFO L226 Difference]: Without dead ends: 68989 [2020-10-28 10:41:43,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:41:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68989 states. [2020-10-28 10:41:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68989 to 68321. [2020-10-28 10:41:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68321 states. [2020-10-28 10:41:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68321 states to 68321 states and 93688 transitions. [2020-10-28 10:41:45,162 INFO L78 Accepts]: Start accepts. Automaton has 68321 states and 93688 transitions. Word has length 1690 [2020-10-28 10:41:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:41:45,163 INFO L481 AbstractCegarLoop]: Abstraction has 68321 states and 93688 transitions. [2020-10-28 10:41:45,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:41:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 68321 states and 93688 transitions. [2020-10-28 10:41:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1781 [2020-10-28 10:41:45,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:41:45,389 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:41:45,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:41:45,390 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:41:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:41:45,391 INFO L82 PathProgramCache]: Analyzing trace with hash -701075994, now seen corresponding path program 1 times [2020-10-28 10:41:45,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:41:45,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369074790] [2020-10-28 10:41:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:41:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:48,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1806 [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:50,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:41:50,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:41:50,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-28 10:41:50,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:51,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:41:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:51,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:51,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:51,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:41:51,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:51,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:41:51,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:51,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:41:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:41:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:51,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:41:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:51,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-28 10:41:51,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:41:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369074790] [2020-10-28 10:41:52,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:41:52,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 10:41:52,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081765583] [2020-10-28 10:41:52,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:41:52,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:41:52,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:41:52,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:41:52,950 INFO L87 Difference]: Start difference. First operand 68321 states and 93688 transitions. Second operand 8 states.