/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:16:40,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:16:40,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:16:40,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:16:40,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:16:40,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:16:40,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:16:40,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:16:40,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:16:40,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:16:40,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:16:40,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:16:40,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:16:40,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:16:40,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:16:40,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:16:40,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:16:40,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:16:40,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:16:40,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:16:40,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:16:40,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:16:40,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:16:40,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:16:40,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:16:40,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:16:40,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:16:40,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:16:40,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:16:40,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:16:40,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:16:40,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:16:40,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:16:40,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:16:40,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:16:40,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:16:40,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:16:40,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:16:40,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:16:40,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:16:40,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:16:40,905 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 [2020-10-12 15:16:40,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:16:40,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:16:40,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:16:40,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:16:40,933 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:16:40,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:16:40,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:16:40,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:16:40,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:16:40,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:16:40,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:16:40,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:16:40,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:16:40,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:16:40,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:16:40,935 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:16:40,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:16:40,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:16:40,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:16:40,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:16:40,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:16:40,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:16:40,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:16:40,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:16:40,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:16:40,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:16:40,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:16:40,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:16:40,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:16:40,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:16:41,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:16:41,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:16:41,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:16:41,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:16:41,312 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:16:41,313 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2020-10-12 15:16:41,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96bd04703/797114f01a334133b062724516f1530c/FLAG734301ab8 [2020-10-12 15:16:42,428 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:16:42,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label26.c [2020-10-12 15:16:42,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96bd04703/797114f01a334133b062724516f1530c/FLAG734301ab8 [2020-10-12 15:16:42,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96bd04703/797114f01a334133b062724516f1530c [2020-10-12 15:16:42,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:16:42,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:16:42,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:16:42,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:16:42,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:16:42,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:16:42" (1/1) ... [2020-10-12 15:16:42,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131dba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:42, skipping insertion in model container [2020-10-12 15:16:42,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:16:42" (1/1) ... [2020-10-12 15:16:42,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:16:43,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:16:45,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:16:45,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:16:46,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:16:46,768 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:16:46,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46 WrapperNode [2020-10-12 15:16:46,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:16:46,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:16:46,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:16:46,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:16:46,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:46,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:46,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:46,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:47,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:47,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:47,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (1/1) ... [2020-10-12 15:16:47,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:16:47,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:16:47,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:16:47,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:16:47,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (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 [2020-10-12 15:16:47,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:16:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:16:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 15:16:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 15:16:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 15:16:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 15:16:47,370 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-12 15:16:47,370 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-12 15:16:47,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:16:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 15:16:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 15:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 15:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 15:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-12 15:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-12 15:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:17:01,420 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:17:01,421 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:17:01,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:17:01 BoogieIcfgContainer [2020-10-12 15:17:01,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:17:01,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:17:01,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:17:01,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:17:01,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:16:42" (1/3) ... [2020-10-12 15:17:01,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf93433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:17:01, skipping insertion in model container [2020-10-12 15:17:01,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:16:46" (2/3) ... [2020-10-12 15:17:01,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf93433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:17:01, skipping insertion in model container [2020-10-12 15:17:01,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:17:01" (3/3) ... [2020-10-12 15:17:01,464 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2020-10-12 15:17:01,477 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:17:01,496 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:17:01,515 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:17:01,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:17:01,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:17:01,575 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:17:01,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:17:01,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:17:01,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:17:01,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:17:01,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:17:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-12 15:17:01,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:17:01,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:17:01,654 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] [2020-10-12 15:17:01,655 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:17:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:17:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2022464298, now seen corresponding path program 1 times [2020-10-12 15:17:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:17:01,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419635936] [2020-10-12 15:17:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:17:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:02,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:02,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:02,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:17:02,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:17:02,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-12 15:17:02,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:17:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:17:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:17:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:17:02,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:17:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:02,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:02,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:17:02,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:17:02,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:17:02,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:02,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:17:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:17:02,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:17:02,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:17:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:17:02,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419635936] [2020-10-12 15:17:02,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:17:02,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 15:17:02,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902823370] [2020-10-12 15:17:02,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:17:02,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:17:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:17:02,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:17:02,725 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-12 15:17:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:17:28,311 INFO L93 Difference]: Finished difference Result 5111 states and 9601 transitions. [2020-10-12 15:17:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:17:28,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-12 15:17:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:17:28,380 INFO L225 Difference]: With dead ends: 5111 [2020-10-12 15:17:28,380 INFO L226 Difference]: Without dead ends: 3270 [2020-10-12 15:17:28,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:17:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2020-10-12 15:17:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3199. [2020-10-12 15:17:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-12 15:17:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 5483 transitions. [2020-10-12 15:17:28,658 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 5483 transitions. Word has length 32 [2020-10-12 15:17:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:17:28,659 INFO L479 AbstractCegarLoop]: Abstraction has 3199 states and 5483 transitions. [2020-10-12 15:17:28,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:17:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 5483 transitions. [2020-10-12 15:17:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 15:17:28,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:17:28,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:17:28,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:17:28,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:17:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:17:28,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2060753195, now seen corresponding path program 1 times [2020-10-12 15:17:28,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:17:28,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559649706] [2020-10-12 15:17:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:17:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:28,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:29,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:30,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:30,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 15:17:30,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:17:30,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-12 15:17:30,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:17:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:17:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 15:17:30,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:17:30,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:17:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:30,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:30,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:30,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:17:30,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:17:30,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:17:30,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:30,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:17:30,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:17:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:17:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:17:30,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:17:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:17:30,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:17:30,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:17:30,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:17:30,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:17:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 15:17:30,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:17:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:17:30,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:17:30,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 15:17:30,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:17:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:17:30,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559649706] [2020-10-12 15:17:30,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:17:30,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:17:30,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713690288] [2020-10-12 15:17:30,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:17:30,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:17:30,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:17:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:17:30,581 INFO L87 Difference]: Start difference. First operand 3199 states and 5483 transitions. Second operand 7 states. [2020-10-12 15:18:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:18:18,318 INFO L93 Difference]: Finished difference Result 9453 states and 16320 transitions. [2020-10-12 15:18:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:18:18,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-12 15:18:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:18:18,363 INFO L225 Difference]: With dead ends: 9453 [2020-10-12 15:18:18,363 INFO L226 Difference]: Without dead ends: 6260 [2020-10-12 15:18:18,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:18:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2020-10-12 15:18:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6124. [2020-10-12 15:18:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6124 states. [2020-10-12 15:18:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 8999 transitions. [2020-10-12 15:18:18,567 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 8999 transitions. Word has length 104 [2020-10-12 15:18:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:18:18,568 INFO L479 AbstractCegarLoop]: Abstraction has 6124 states and 8999 transitions. [2020-10-12 15:18:18,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:18:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 8999 transitions. [2020-10-12 15:18:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 15:18:18,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:18:18,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:18:18,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:18:18,573 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:18:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:18:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 447645141, now seen corresponding path program 1 times [2020-10-12 15:18:18,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:18:18,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586562684] [2020-10-12 15:18:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:18:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:18:18,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:19,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:18:19,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-12 15:18:19,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:18:19,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-12 15:18:19,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:18:19,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:18:19,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:18:19,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 15:18:19,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:18:19,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:18:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:18:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:18:19,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:18:19,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:18:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 15:18:19,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:18:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:18:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:18:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:18:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:18:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:18:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:18:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:18:19,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:18:19,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 15:18:19,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:18:19,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-12 15:18:19,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:18:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:18:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:18:19,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 15:18:19,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:18:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:18:20,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586562684] [2020-10-12 15:18:20,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:18:20,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:18:20,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123293316] [2020-10-12 15:18:20,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:18:20,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:18:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:18:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:18:20,047 INFO L87 Difference]: Start difference. First operand 6124 states and 8999 transitions. Second operand 7 states. [2020-10-12 15:19:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:19:11,082 INFO L93 Difference]: Finished difference Result 18550 states and 27600 transitions. [2020-10-12 15:19:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:19:11,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-12 15:19:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:19:11,147 INFO L225 Difference]: With dead ends: 18550 [2020-10-12 15:19:11,147 INFO L226 Difference]: Without dead ends: 12432 [2020-10-12 15:19:11,165 INFO L675 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 [2020-10-12 15:19:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12432 states. [2020-10-12 15:19:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12432 to 12183. [2020-10-12 15:19:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12183 states. [2020-10-12 15:19:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12183 states to 12183 states and 17448 transitions. [2020-10-12 15:19:11,530 INFO L78 Accepts]: Start accepts. Automaton has 12183 states and 17448 transitions. Word has length 113 [2020-10-12 15:19:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:19:11,531 INFO L479 AbstractCegarLoop]: Abstraction has 12183 states and 17448 transitions. [2020-10-12 15:19:11,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:19:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 12183 states and 17448 transitions. [2020-10-12 15:19:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-12 15:19:11,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:19:11,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:19:11,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:19:11,545 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:19:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:19:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1708146369, now seen corresponding path program 1 times [2020-10-12 15:19:11,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:19:11,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816646352] [2020-10-12 15:19:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:19:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:19:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:19:11,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:19:12,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:19:12,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:19:12,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-12 15:19:12,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:19:12,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1354 [2020-10-12 15:19:12,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:19:12,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:19:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:19:12,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 15:19:12,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 15:19:13,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:19:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:19:13,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:19:13,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:19:13,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:19:13,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:19:13,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:19:13,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:19:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:19:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:19:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:19:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:19:13,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:19:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:19:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:19:13,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:19:13,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 15:19:13,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:19:13,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 15:19:13,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:19:13,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:19:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:19:13,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 15:19:13,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:19:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:19:13,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816646352] [2020-10-12 15:19:13,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:19:13,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:19:13,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125806379] [2020-10-12 15:19:13,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:19:13,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:19:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:19:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:19:13,451 INFO L87 Difference]: Start difference. First operand 12183 states and 17448 transitions. Second operand 7 states. [2020-10-12 15:20:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:20:37,089 INFO L93 Difference]: Finished difference Result 37217 states and 54331 transitions. [2020-10-12 15:20:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:20:37,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-12 15:20:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:20:37,200 INFO L225 Difference]: With dead ends: 37217 [2020-10-12 15:20:37,200 INFO L226 Difference]: Without dead ends: 25040 [2020-10-12 15:20:37,235 INFO L675 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 [2020-10-12 15:20:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25040 states. [2020-10-12 15:20:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25040 to 24376. [2020-10-12 15:20:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24376 states. [2020-10-12 15:20:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 31649 transitions. [2020-10-12 15:20:37,870 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 31649 transitions. Word has length 133 [2020-10-12 15:20:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:20:37,871 INFO L479 AbstractCegarLoop]: Abstraction has 24376 states and 31649 transitions. [2020-10-12 15:20:37,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:20:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 31649 transitions. [2020-10-12 15:20:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-12 15:20:37,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:20:37,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:20:37,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:20:37,877 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:20:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:20:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -881976424, now seen corresponding path program 1 times [2020-10-12 15:20:37,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:20:37,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349934020] [2020-10-12 15:20:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:20:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:20:37,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:20:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:20:39,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:20:39,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-12 15:20:39,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:20:39,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1874 [2020-10-12 15:20:39,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:20:39,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:20:39,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:20:39,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-12 15:20:39,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:20:39,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:20:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:20:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:20:39,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:20:39,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:20:39,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:20:39,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:20:39,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:20:39,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:20:39,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:20:39,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:20:39,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:20:40,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:20:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:20:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:20:40,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:20:40,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-12 15:20:40,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:20:40,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-12 15:20:40,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:20:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:20:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:20:40,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-12 15:20:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:20:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:20:40,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349934020] [2020-10-12 15:20:40,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:20:40,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:20:40,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822747222] [2020-10-12 15:20:40,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:20:40,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:20:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:20:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:20:40,980 INFO L87 Difference]: Start difference. First operand 24376 states and 31649 transitions. Second operand 7 states.