/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/Problem13_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:48:22,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:48:22,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:48:22,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:48:22,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:48:22,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:48:22,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:48:23,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:48:23,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:48:23,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:48:23,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:48:23,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:48:23,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:48:23,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:48:23,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:48:23,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:48:23,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:48:23,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:48:23,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:48:23,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:48:23,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:48:23,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:48:23,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:48:23,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:48:23,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:48:23,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:48:23,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:48:23,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:48:23,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:48:23,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:48:23,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:48:23,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:48:23,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:48:23,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:48:23,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:48:23,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:48:23,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:48:23,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:48:23,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:48:23,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:48:23,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:48:23,087 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 13:48:23,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:48:23,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:48:23,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:48:23,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:48:23,140 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:48:23,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:48:23,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:48:23,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:48:23,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:48:23,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:48:23,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:48:23,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:48:23,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:48:23,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:48:23,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:48:23,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:48:23,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:48:23,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:48:23,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:48:23,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:48:23,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:48:23,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:48:23,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:48:23,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:48:23,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:48:23,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:48:23,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:48:23,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:48:23,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:48:23,148 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 13:48:23,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:48:23,499 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:48:23,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:48:23,505 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:48:23,506 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:48:23,507 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label54.c [2020-10-12 13:48:23,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89e40c985/326fc455cd8a4eb5ac01a3fa0a403f97/FLAGe189c096b [2020-10-12 13:48:24,662 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:48:24,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label54.c [2020-10-12 13:48:24,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89e40c985/326fc455cd8a4eb5ac01a3fa0a403f97/FLAGe189c096b [2020-10-12 13:48:25,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89e40c985/326fc455cd8a4eb5ac01a3fa0a403f97 [2020-10-12 13:48:25,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:48:25,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:48:25,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:48:25,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:48:25,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:48:25,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:48:25" (1/1) ... [2020-10-12 13:48:25,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:25, skipping insertion in model container [2020-10-12 13:48:25,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:48:25" (1/1) ... [2020-10-12 13:48:25,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:48:25,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:48:27,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:48:27,067 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:48:27,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:48:27,970 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:48:27,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27 WrapperNode [2020-10-12 13:48:27,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:48:27,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:48:27,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:48:27,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:48:27,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:27,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:28,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:28,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:28,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:28,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:28,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (1/1) ... [2020-10-12 13:48:28,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:48:28,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:48:28,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:48:28,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:48:28,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (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 13:48:28,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:48:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:48:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:48:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:48:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:48:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:48:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:48:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:48:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:48:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:48:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:48:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:48:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:48:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:48:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:48:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:48:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:48:40,933 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:48:40,935 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:48:40,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:48:40 BoogieIcfgContainer [2020-10-12 13:48:40,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:48:40,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:48:40,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:48:40,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:48:40,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:48:25" (1/3) ... [2020-10-12 13:48:40,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645123d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:48:40, skipping insertion in model container [2020-10-12 13:48:40,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:48:27" (2/3) ... [2020-10-12 13:48:40,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645123d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:48:40, skipping insertion in model container [2020-10-12 13:48:40,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:48:40" (3/3) ... [2020-10-12 13:48:40,964 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label54.c [2020-10-12 13:48:40,976 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:48:40,986 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:48:41,001 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:48:41,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:48:41,034 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:48:41,035 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:48:41,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:48:41,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:48:41,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:48:41,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:48:41,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:48:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:48:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 13:48:41,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:48:41,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:48:41,088 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:48:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:48:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1861016480, now seen corresponding path program 1 times [2020-10-12 13:48:41,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:48:41,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841165338] [2020-10-12 13:48:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:48:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:41,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:41,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 13:48:41,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:41,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-12 13:48:41,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:48:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:48:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 13:48:41,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:48:41,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:48:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:41,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:41,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:41,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:48:41,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 13:48:41,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:41,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:48:41,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:48:41,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:48:41,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:48:41,905 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 13:48:41,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841165338] [2020-10-12 13:48:41,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:48:41,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:48:41,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192107925] [2020-10-12 13:48:41,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:48:41,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:48:41,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:48:41,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:48:41,940 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:48:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:48:59,865 INFO L93 Difference]: Finished difference Result 3152 states and 5831 transitions. [2020-10-12 13:48:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:48:59,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-12 13:48:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:48:59,922 INFO L225 Difference]: With dead ends: 3152 [2020-10-12 13:48:59,923 INFO L226 Difference]: Without dead ends: 1954 [2020-10-12 13:48:59,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:48:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-12 13:49:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1885. [2020-10-12 13:49:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-12 13:49:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3103 transitions. [2020-10-12 13:49:00,149 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3103 transitions. Word has length 33 [2020-10-12 13:49:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:49:00,152 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 3103 transitions. [2020-10-12 13:49:00,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:49:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3103 transitions. [2020-10-12 13:49:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-12 13:49:00,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:49:00,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:49:00,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:49:00,166 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:49:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:49:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1728074920, now seen corresponding path program 1 times [2020-10-12 13:49:00,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:49:00,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422035017] [2020-10-12 13:49:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:49:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:00,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:01,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:01,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 13:49:01,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:49:01,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1276 [2020-10-12 13:49:01,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:49:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:49:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:49:01,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:49:01,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:49:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:01,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:01,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:01,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:49:01,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:01,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 13:49:01,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:49:01,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:49:01,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:49:01,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:01,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:49:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:01,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:01,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:01,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 13:49:01,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:01,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-12 13:49:01,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:01,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:49:01,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:49:01,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 13:49:01,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:49:01,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422035017] [2020-10-12 13:49:01,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:49:01,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 13:49:01,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511305394] [2020-10-12 13:49:01,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:49:01,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:49:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:49:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:49:01,984 INFO L87 Difference]: Start difference. First operand 1885 states and 3103 transitions. Second operand 8 states. [2020-10-12 13:49:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:49:35,963 INFO L93 Difference]: Finished difference Result 7269 states and 12083 transitions. [2020-10-12 13:49:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 13:49:35,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-12 13:49:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:49:36,006 INFO L225 Difference]: With dead ends: 7269 [2020-10-12 13:49:36,006 INFO L226 Difference]: Without dead ends: 5390 [2020-10-12 13:49:36,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-12 13:49:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-10-12 13:49:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 5320. [2020-10-12 13:49:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5320 states. [2020-10-12 13:49:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 7792 transitions. [2020-10-12 13:49:36,231 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 7792 transitions. Word has length 103 [2020-10-12 13:49:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:49:36,232 INFO L479 AbstractCegarLoop]: Abstraction has 5320 states and 7792 transitions. [2020-10-12 13:49:36,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:49:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 7792 transitions. [2020-10-12 13:49:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 13:49:36,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:49:36,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:49:36,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:49:36,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:49:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:49:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash -881411451, now seen corresponding path program 1 times [2020-10-12 13:49:36,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:49:36,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517393105] [2020-10-12 13:49:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:49:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:36,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:37,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 13:49:37,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:49:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-12 13:49:37,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:49:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:49:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 13:49:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:49:37,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:49:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:37,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:37,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:49:37,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:37,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 13:49:37,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:37,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:49:37,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:49:37,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:49:37,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:49:37,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:49:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:37,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:37,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:37,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 13:49:37,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:37,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-12 13:49:37,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:37,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:49:37,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:49:37,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:49:37,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:49:37,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517393105] [2020-10-12 13:49:37,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:49:37,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:49:37,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429664495] [2020-10-12 13:49:37,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:49:37,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:49:37,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:49:37,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:49:37,596 INFO L87 Difference]: Start difference. First operand 5320 states and 7792 transitions. Second operand 7 states. [2020-10-12 13:50:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:50:00,165 INFO L93 Difference]: Finished difference Result 11679 states and 17693 transitions. [2020-10-12 13:50:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:50:00,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-12 13:50:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:50:00,209 INFO L225 Difference]: With dead ends: 11679 [2020-10-12 13:50:00,210 INFO L226 Difference]: Without dead ends: 6365 [2020-10-12 13:50:00,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:50:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2020-10-12 13:50:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 6181. [2020-10-12 13:50:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6181 states. [2020-10-12 13:50:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 8337 transitions. [2020-10-12 13:50:00,418 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 8337 transitions. Word has length 108 [2020-10-12 13:50:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:50:00,419 INFO L479 AbstractCegarLoop]: Abstraction has 6181 states and 8337 transitions. [2020-10-12 13:50:00,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:50:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 8337 transitions. [2020-10-12 13:50:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 13:50:00,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:50:00,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:50:00,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:50:00,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:50:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:50:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1831221931, now seen corresponding path program 1 times [2020-10-12 13:50:00,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:50:00,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559278909] [2020-10-12 13:50:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:50:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:01,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:01,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 13:50:01,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:50:01,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-12 13:50:01,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:50:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:50:01,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 13:50:01,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:50:01,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:50:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:01,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:01,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:50:01,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:50:01,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:50:01,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:50:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:50:01,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:50:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:01,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:50:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:01,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:02,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:02,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 13:50:02,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:50:02,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-12 13:50:02,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:50:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:50:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 13:50:02,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:50:02,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559278909] [2020-10-12 13:50:02,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:50:02,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:50:02,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452357319] [2020-10-12 13:50:02,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:50:02,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:50:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:50:02,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:50:02,421 INFO L87 Difference]: Start difference. First operand 6181 states and 8337 transitions. Second operand 7 states. [2020-10-12 13:50:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:50:22,413 INFO L93 Difference]: Finished difference Result 12654 states and 17069 transitions. [2020-10-12 13:50:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:50:22,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-10-12 13:50:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:50:22,441 INFO L225 Difference]: With dead ends: 12654 [2020-10-12 13:50:22,442 INFO L226 Difference]: Without dead ends: 6479 [2020-10-12 13:50:22,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:50:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2020-10-12 13:50:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 6189. [2020-10-12 13:50:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6189 states. [2020-10-12 13:50:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 8313 transitions. [2020-10-12 13:50:22,609 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 8313 transitions. Word has length 148 [2020-10-12 13:50:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:50:22,611 INFO L479 AbstractCegarLoop]: Abstraction has 6189 states and 8313 transitions. [2020-10-12 13:50:22,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:50:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 8313 transitions. [2020-10-12 13:50:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 13:50:22,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:50:22,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:50:22,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:50:22,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:50:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:50:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 53222904, now seen corresponding path program 1 times [2020-10-12 13:50:22,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:50:22,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399691871] [2020-10-12 13:50:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:50:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:22,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:23,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:23,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 13:50:23,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:50:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-12 13:50:23,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:50:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:50:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-12 13:50:23,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:23,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:50:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:23,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:23,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:23,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:50:23,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:50:23,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:50:23,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:23,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:50:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:50:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:50:23,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:50:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:24,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:24,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:50:24,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:50:24,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-12 13:50:24,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:24,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:50:24,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:50:24,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:50:24,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:50:24,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399691871] [2020-10-12 13:50:24,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:50:24,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 13:50:24,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272918336] [2020-10-12 13:50:24,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:50:24,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:50:24,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:50:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:50:24,368 INFO L87 Difference]: Start difference. First operand 6189 states and 8313 transitions. Second operand 7 states. [2020-10-12 13:50:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:50:45,932 INFO L93 Difference]: Finished difference Result 15120 states and 21419 transitions. [2020-10-12 13:50:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 13:50:45,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2020-10-12 13:50:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:50:45,972 INFO L225 Difference]: With dead ends: 15120 [2020-10-12 13:50:45,972 INFO L226 Difference]: Without dead ends: 9740 [2020-10-12 13:50:45,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:50:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2020-10-12 13:50:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 9650. [2020-10-12 13:50:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9650 states. [2020-10-12 13:50:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9650 states to 9650 states and 12430 transitions. [2020-10-12 13:50:46,181 INFO L78 Accepts]: Start accepts. Automaton has 9650 states and 12430 transitions. Word has length 162 [2020-10-12 13:50:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:50:46,181 INFO L479 AbstractCegarLoop]: Abstraction has 9650 states and 12430 transitions. [2020-10-12 13:50:46,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:50:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 9650 states and 12430 transitions. [2020-10-12 13:50:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-12 13:50:46,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:50:46,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 13:50:46,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:50:46,188 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:50:46,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:50:46,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1114171885, now seen corresponding path program 1 times [2020-10-12 13:50:46,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:50:46,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933094612] [2020-10-12 13:50:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:50:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:46,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:47,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:48,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:48,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-12 13:50:48,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 13:50:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-12 13:50:48,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:50:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:50:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-12 13:50:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:48,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:50:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:48,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:48,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:48,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:50:48,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:50:48,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:50:48,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:50:48,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:50:48,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:50:48,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:48,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:50:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:48,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:48,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:48,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:50:48,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:50:48,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-12 13:50:48,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:50:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:50:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:50:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:50:48,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:50:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:50:48,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:50:49,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:50:49,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 13:50:49,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:50:49,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-12 13:50:49,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:50:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:50:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:50:49,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 13:50:49,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:50:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 13:50:49,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933094612] [2020-10-12 13:50:49,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:50:49,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:50:49,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947560064] [2020-10-12 13:50:49,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:50:49,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:50:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:50:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:50:49,548 INFO L87 Difference]: Start difference. First operand 9650 states and 12430 transitions. Second operand 8 states. [2020-10-12 13:51:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:51:11,183 INFO L93 Difference]: Finished difference Result 26655 states and 36317 transitions. [2020-10-12 13:51:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 13:51:11,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 238 [2020-10-12 13:51:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:51:11,265 INFO L225 Difference]: With dead ends: 26655 [2020-10-12 13:51:11,265 INFO L226 Difference]: Without dead ends: 17814 [2020-10-12 13:51:11,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 13:51:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17814 states. [2020-10-12 13:51:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17814 to 17510. [2020-10-12 13:51:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17510 states. [2020-10-12 13:51:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17510 states to 17510 states and 22056 transitions. [2020-10-12 13:51:11,692 INFO L78 Accepts]: Start accepts. Automaton has 17510 states and 22056 transitions. Word has length 238 [2020-10-12 13:51:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:51:11,693 INFO L479 AbstractCegarLoop]: Abstraction has 17510 states and 22056 transitions. [2020-10-12 13:51:11,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:51:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17510 states and 22056 transitions. [2020-10-12 13:51:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-12 13:51:11,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:51:11,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 13:51:11,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:51:11,698 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:51:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:51:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1948351668, now seen corresponding path program 1 times [2020-10-12 13:51:11,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:51:11,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392055476] [2020-10-12 13:51:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:51:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:11,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:12,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:12,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-12 13:51:12,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:51:12,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-12 13:51:12,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:12,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:51:12,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-12 13:51:12,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 13:51:12,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:51:12,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:51:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:12,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:12,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:12,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:51:12,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:51:12,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:51:12,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:12,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:51:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:51:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:51:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:51:12,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:51:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:13,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:13,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:51:13,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:51:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 13:51:13,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:51:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:51:13,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:51:13,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:51:13,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:51:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:13,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:13,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 13:51:13,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:51:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-12 13:51:13,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:51:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:51:13,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 13:51:13,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:51:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-12 13:51:14,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392055476] [2020-10-12 13:51:14,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:51:14,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:51:14,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792492420] [2020-10-12 13:51:14,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 13:51:14,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:51:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 13:51:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:51:14,090 INFO L87 Difference]: Start difference. First operand 17510 states and 22056 transitions. Second operand 5 states. [2020-10-12 13:51:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:51:34,788 INFO L93 Difference]: Finished difference Result 43477 states and 57221 transitions. [2020-10-12 13:51:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:51:34,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2020-10-12 13:51:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:51:34,883 INFO L225 Difference]: With dead ends: 43477 [2020-10-12 13:51:34,883 INFO L226 Difference]: Without dead ends: 26776 [2020-10-12 13:51:34,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:51:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26776 states. [2020-10-12 13:51:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26776 to 26704. [2020-10-12 13:51:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26704 states. [2020-10-12 13:51:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26704 states to 26704 states and 32946 transitions. [2020-10-12 13:51:35,447 INFO L78 Accepts]: Start accepts. Automaton has 26704 states and 32946 transitions. Word has length 240 [2020-10-12 13:51:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:51:35,448 INFO L479 AbstractCegarLoop]: Abstraction has 26704 states and 32946 transitions. [2020-10-12 13:51:35,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 13:51:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26704 states and 32946 transitions. [2020-10-12 13:51:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-12 13:51:35,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:51:35,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 13:51:35,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:51:35,454 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:51:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:51:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1680827244, now seen corresponding path program 1 times [2020-10-12 13:51:35,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:51:35,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641999787] [2020-10-12 13:51:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:51:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:35,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:36,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-12 13:51:36,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 13:51:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-12 13:51:36,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:51:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-12 13:51:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 13:51:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:51:36,814 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-10-12 13:51:36,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:51:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:36,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:36,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:51:36,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:51:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:51:36,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:51:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:51:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:51:36,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:51:36,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:51:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:37,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:37,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:51:37,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:51:37,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 13:51:37,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:51:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:51:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 13:51:37,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:51:37,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:51:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:51:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:37,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:37,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:51:37,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:51:37,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 13:51:37,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 13:51:37,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-12 13:51:37,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:51:37,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:51:37,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:51:37,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 13:51:37,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:51:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 13:51:37,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641999787] [2020-10-12 13:51:37,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:51:37,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:51:37,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272686250] [2020-10-12 13:51:37,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:51:37,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:51:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:51:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:51:37,542 INFO L87 Difference]: Start difference. First operand 26704 states and 32946 transitions. Second operand 7 states. [2020-10-12 13:52:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:52:01,971 INFO L93 Difference]: Finished difference Result 43737 states and 55771 transitions. [2020-10-12 13:52:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:52:01,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2020-10-12 13:52:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:52:02,052 INFO L225 Difference]: With dead ends: 43737 [2020-10-12 13:52:02,052 INFO L226 Difference]: Without dead ends: 27562 [2020-10-12 13:52:02,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:52:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27562 states. [2020-10-12 13:52:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27562 to 27133. [2020-10-12 13:52:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27133 states. [2020-10-12 13:52:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27133 states to 27133 states and 33738 transitions. [2020-10-12 13:52:02,561 INFO L78 Accepts]: Start accepts. Automaton has 27133 states and 33738 transitions. Word has length 252 [2020-10-12 13:52:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:52:02,561 INFO L479 AbstractCegarLoop]: Abstraction has 27133 states and 33738 transitions. [2020-10-12 13:52:02,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:52:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 27133 states and 33738 transitions. [2020-10-12 13:52:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-12 13:52:02,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:52:02,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 13:52:02,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 13:52:02,567 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:52:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:52:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash -427538219, now seen corresponding path program 1 times [2020-10-12 13:52:02,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:52:02,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900906056] [2020-10-12 13:52:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:52:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:52:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:06,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:52:06,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-12 13:52:06,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:52:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3690 [2020-10-12 13:52:06,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:52:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:52:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-12 13:52:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 13:52:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:52:06,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:52:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:52:06,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:06,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:52:06,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:52:06,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:52:06,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:52:06,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:52:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:52:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:52:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:52:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:52:06,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:52:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:52:06,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:06,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:52:06,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:52:06,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:52:06,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 13:52:06,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:52:06,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:52:06,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:52:06,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:52:06,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:52:06,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:52:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:52:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:06,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:52:06,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:52:06,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:52:06,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 13:52:06,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:52:06,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:52:06,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:52:06,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 13:52:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 116 [2020-10-12 13:52:06,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-12 13:52:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:52:06,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:52:06,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:52:06,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 13:52:06,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:52:06,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-12 13:52:06,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:52:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:52:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:52:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:52:06,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:52:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-12 13:52:07,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900906056] [2020-10-12 13:52:07,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:52:07,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:52:07,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374333145] [2020-10-12 13:52:07,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:52:07,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:52:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:52:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:52:07,119 INFO L87 Difference]: Start difference. First operand 27133 states and 33738 transitions. Second operand 7 states.