/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:11:57,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:11:57,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:11:57,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:11:57,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:11:57,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:11:57,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:11:57,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:11:57,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:11:57,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:11:57,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:11:57,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:11:57,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:11:57,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:11:57,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:11:57,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:11:57,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:11:57,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:11:57,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:11:57,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:11:57,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:11:57,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:11:57,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:11:57,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:11:57,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:11:57,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:11:57,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:11:57,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:11:57,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:11:57,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:11:57,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:11:57,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:11:57,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:11:57,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:11:57,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:11:57,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:11:57,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:11:57,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:11:57,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:11:57,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:11:57,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:11:57,415 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 [2020-10-13 10:11:57,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:11:57,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:11:57,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:11:57,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:11:57,462 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:11:57,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:11:57,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:11:57,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:11:57,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:11:57,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:11:57,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:11:57,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:11:57,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:11:57,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:11:57,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:11:57,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:11:57,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:11:57,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:11:57,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:11:57,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:11:57,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:11:57,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:11:57,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:11:57,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:11:57,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:11:57,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:11:57,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:11:57,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:11:57,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:11:57,469 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:11:57,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:11:57,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:11:57,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:11:57,842 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:11:57,843 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:11:57,844 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-13 10:11:57,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a7185361/6e1d7fe457ba4aaab684ae71ad3c2ee3/FLAG78c7ae884 [2020-10-13 10:11:59,002 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:11:59,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2020-10-13 10:11:59,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a7185361/6e1d7fe457ba4aaab684ae71ad3c2ee3/FLAG78c7ae884 [2020-10-13 10:11:59,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a7185361/6e1d7fe457ba4aaab684ae71ad3c2ee3 [2020-10-13 10:11:59,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:11:59,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:11:59,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:11:59,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:11:59,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:11:59,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:11:59" (1/1) ... [2020-10-13 10:11:59,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b95b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:11:59, skipping insertion in model container [2020-10-13 10:11:59,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:11:59" (1/1) ... [2020-10-13 10:11:59,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:11:59,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:12:02,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:12:02,153 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:12:03,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:12:03,551 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:12:03,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03 WrapperNode [2020-10-13 10:12:03,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:12:03,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:12:03,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:12:03,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:12:03,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:03,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:03,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:03,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:03,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:03,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:04,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (1/1) ... [2020-10-13 10:12:04,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:12:04,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:12:04,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:12:04,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:12:04,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (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 [2020-10-13 10:12:04,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:12:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:12:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:12:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:12:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:12:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:12:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:12:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:12:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:12:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:12:04,302 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:12:04,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:12:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:12:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:12:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:12:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:12:18,253 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:12:18,253 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:12:18,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:12:18 BoogieIcfgContainer [2020-10-13 10:12:18,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:12:18,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:12:18,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:12:18,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:12:18,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:11:59" (1/3) ... [2020-10-13 10:12:18,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c824ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:12:18, skipping insertion in model container [2020-10-13 10:12:18,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:03" (2/3) ... [2020-10-13 10:12:18,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c824ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:12:18, skipping insertion in model container [2020-10-13 10:12:18,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:12:18" (3/3) ... [2020-10-13 10:12:18,287 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label55.c [2020-10-13 10:12:18,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:12:18,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:12:18,340 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:12:18,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:12:18,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:12:18,393 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:12:18,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:12:18,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:12:18,394 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:12:18,394 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:12:18,394 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:12:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:12:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:12:18,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:18,472 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] [2020-10-13 10:12:18,473 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -775038598, now seen corresponding path program 1 times [2020-10-13 10:12:18,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:18,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039451590] [2020-10-13 10:12:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:19,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:19,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:12:19,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:19,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-13 10:12:19,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:12:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:12:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:12:19,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:12:19,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:19,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:19,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:19,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:19,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:12:19,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:19,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:19,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:19,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:12:19,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:19,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039451590] [2020-10-13 10:12:19,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:12:19,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:12:19,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813598647] [2020-10-13 10:12:19,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:12:19,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:12:19,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:12:19,283 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:12:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:45,164 INFO L93 Difference]: Finished difference Result 5031 states and 9453 transitions. [2020-10-13 10:12:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:12:45,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 10:12:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:45,227 INFO L225 Difference]: With dead ends: 5031 [2020-10-13 10:12:45,228 INFO L226 Difference]: Without dead ends: 3190 [2020-10-13 10:12:45,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:12:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-13 10:12:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2020-10-13 10:12:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2020-10-13 10:12:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4965 transitions. [2020-10-13 10:12:45,522 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4965 transitions. Word has length 20 [2020-10-13 10:12:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:45,523 INFO L479 AbstractCegarLoop]: Abstraction has 3184 states and 4965 transitions. [2020-10-13 10:12:45,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:12:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4965 transitions. [2020-10-13 10:12:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 10:12:45,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:45,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:12:45,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:12:45,531 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 737075260, now seen corresponding path program 1 times [2020-10-13 10:12:45,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:45,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744249277] [2020-10-13 10:12:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:45,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:45,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:47,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:47,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:48,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:48,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:12:48,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:12:48,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2468 [2020-10-13 10:12:48,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:48,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:48,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:12:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:12:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:48,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:48,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:48,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:48,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:48,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:12:48,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:12:48,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:48,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:12:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:48,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:12:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:48,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:48,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:12:48,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:48,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 10:12:48,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:12:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:12:48,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:48,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744249277] [2020-10-13 10:12:48,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:12:48,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:12:48,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538251599] [2020-10-13 10:12:48,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:12:48,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:12:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:12:48,397 INFO L87 Difference]: Start difference. First operand 3184 states and 4965 transitions. Second operand 5 states. [2020-10-13 10:13:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:13:26,343 INFO L93 Difference]: Finished difference Result 9218 states and 14512 transitions. [2020-10-13 10:13:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:13:26,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-13 10:13:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:13:26,390 INFO L225 Difference]: With dead ends: 9218 [2020-10-13 10:13:26,391 INFO L226 Difference]: Without dead ends: 6040 [2020-10-13 10:13:26,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:13:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-10-13 10:13:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6024. [2020-10-13 10:13:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:13:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8357 transitions. [2020-10-13 10:13:26,579 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8357 transitions. Word has length 93 [2020-10-13 10:13:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:13:26,580 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8357 transitions. [2020-10-13 10:13:26,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:13:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8357 transitions. [2020-10-13 10:13:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 10:13:26,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:13:26,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:13:26,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:13:26,591 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:13:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:13:26,591 INFO L82 PathProgramCache]: Analyzing trace with hash -951868482, now seen corresponding path program 1 times [2020-10-13 10:13:26,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:13:26,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478717233] [2020-10-13 10:13:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:13:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:26,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:26,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:27,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:27,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:13:27,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:13:27,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-13 10:13:27,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:27,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:13:27,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 10:13:27,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:13:27,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:27,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:13:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:27,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:27,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:13:27,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:13:27,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:13:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:27,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:13:27,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:27,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:13:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:13:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:13:27,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:13:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:13:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:13:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 10:13:27,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:13:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:13:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:13:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:13:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:13:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:13:27,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478717233] [2020-10-13 10:13:27,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:13:27,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:13:28,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432929908] [2020-10-13 10:13:28,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:13:28,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:13:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:13:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:13:28,003 INFO L87 Difference]: Start difference. First operand 6024 states and 8357 transitions. Second operand 6 states. [2020-10-13 10:14:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:14:14,626 INFO L93 Difference]: Finished difference Result 17710 states and 26139 transitions. [2020-10-13 10:14:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:14:14,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-13 10:14:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:14:14,678 INFO L225 Difference]: With dead ends: 17710 [2020-10-13 10:14:14,678 INFO L226 Difference]: Without dead ends: 11692 [2020-10-13 10:14:14,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:14:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11692 states. [2020-10-13 10:14:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11692 to 11680. [2020-10-13 10:14:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11680 states. [2020-10-13 10:14:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 16026 transitions. [2020-10-13 10:14:14,931 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 16026 transitions. Word has length 93 [2020-10-13 10:14:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:14:14,932 INFO L479 AbstractCegarLoop]: Abstraction has 11680 states and 16026 transitions. [2020-10-13 10:14:14,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:14:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 16026 transitions. [2020-10-13 10:14:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 10:14:14,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:14:14,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:14:14,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:14:14,935 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:14:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:14:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash 741548311, now seen corresponding path program 1 times [2020-10-13 10:14:14,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:14:14,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420924731] [2020-10-13 10:14:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:14:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:14,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:15,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:15,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 10:14:15,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:14:15,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-13 10:14:15,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:14:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-13 10:14:15,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:14:15,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:14:15,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:14:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:15,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:15,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:14:15,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:15,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:14:15,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:14:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:14:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:14:15,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:14:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:16,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:16,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:16,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:14:16,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-13 10:14:16,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:14:16,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:16,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:14:16,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:14:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:14:16,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420924731] [2020-10-13 10:14:16,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:14:16,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:14:16,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566826448] [2020-10-13 10:14:16,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:14:16,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:14:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:14:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:14:16,243 INFO L87 Difference]: Start difference. First operand 11680 states and 16026 transitions. Second operand 5 states. [2020-10-13 10:14:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:14:56,109 INFO L93 Difference]: Finished difference Result 34679 states and 48527 transitions. [2020-10-13 10:14:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:14:56,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-10-13 10:14:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:14:56,208 INFO L225 Difference]: With dead ends: 34679 [2020-10-13 10:14:56,208 INFO L226 Difference]: Without dead ends: 23005 [2020-10-13 10:14:56,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:14:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23005 states. [2020-10-13 10:14:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23005 to 22937. [2020-10-13 10:14:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22937 states. [2020-10-13 10:14:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22937 states to 22937 states and 31099 transitions. [2020-10-13 10:14:56,813 INFO L78 Accepts]: Start accepts. Automaton has 22937 states and 31099 transitions. Word has length 140 [2020-10-13 10:14:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:14:56,815 INFO L479 AbstractCegarLoop]: Abstraction has 22937 states and 31099 transitions. [2020-10-13 10:14:56,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:14:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22937 states and 31099 transitions. [2020-10-13 10:14:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 10:14:56,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:14:56,823 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:14:56,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:14:56,824 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:14:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:14:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash -261840005, now seen corresponding path program 1 times [2020-10-13 10:14:56,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:14:56,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773620151] [2020-10-13 10:14:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:14:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:56,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:57,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:57,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:57,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:00,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:00,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 10:15:00,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:15:00,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3944 [2020-10-13 10:15:00,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:15:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 189 [2020-10-13 10:15:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:15:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:00,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:00,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:00,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:00,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:00,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:00,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:15:00,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:00,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:00,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:00,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:00,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:00,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:15:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:00,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:00,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:00,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:15:00,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:00,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:15:00,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:00,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:00,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:00,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:00,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:01,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 10:15:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:01,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:01,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:01,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 10:15:01,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:01,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 10:15:01,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:15:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 10:15:01,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-13 10:15:01,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773620151] [2020-10-13 10:15:01,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:01,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:15:01,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476146483] [2020-10-13 10:15:01,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:01,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:01,179 INFO L87 Difference]: Start difference. First operand 22937 states and 31099 transitions. Second operand 5 states.