/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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:40:04,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:40:04,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:40:04,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:40:04,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:40:04,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:40:04,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:40:04,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:40:04,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:40:04,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:40:04,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:40:04,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:40:04,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:40:04,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:40:04,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:40:04,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:40:04,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:40:04,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:40:04,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:40:04,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:40:04,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:40:04,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:40:04,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:40:04,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:40:04,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:40:04,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:40:04,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:40:04,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:40:04,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:40:04,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:40:04,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:40:04,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:40:04,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:40:04,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:40:04,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:40:04,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:40:04,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:40:04,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:40:04,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:40:04,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:40:04,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:40:04,329 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 14:40:04,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:40:04,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:40:04,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:40:04,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:40:04,371 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:40:04,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:40:04,372 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:40:04,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:40:04,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:40:04,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:40:04,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:40:04,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:40:04,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:40:04,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:40:04,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:40:04,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:40:04,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:40:04,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:40:04,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:40:04,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:40:04,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:40:04,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:40:04,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:40:04,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:40:04,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:40:04,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:40:04,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:40:04,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:40:04,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:40:04,378 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 14:40:04,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:40:04,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:40:04,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:40:04,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:40:04,717 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:40:04,718 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:40:04,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fed37a9bb/9b3633b4b6324f259f3702b536290a16/FLAG03492bed2 [2020-10-13 14:40:05,299 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:40:05,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:40:05,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fed37a9bb/9b3633b4b6324f259f3702b536290a16/FLAG03492bed2 [2020-10-13 14:40:05,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fed37a9bb/9b3633b4b6324f259f3702b536290a16 [2020-10-13 14:40:05,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:40:05,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:40:05,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:40:05,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:40:05,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:40:05,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:40:05" (1/1) ... [2020-10-13 14:40:05,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39062356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:05, skipping insertion in model container [2020-10-13 14:40:05,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:40:05" (1/1) ... [2020-10-13 14:40:05,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:40:05,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:40:05,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:40:05,928 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:40:06,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:40:06,113 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:40:06,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06 WrapperNode [2020-10-13 14:40:06,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:40:06,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:40:06,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:40:06,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:40:06,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (1/1) ... [2020-10-13 14:40:06,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:40:06,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:40:06,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:40:06,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:40:06,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (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 14:40:06,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:40:06,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:40:06,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:40:06,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:40:06,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:40:06,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:40:06,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:40:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:40:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:40:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:40:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:40:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:40:06,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:40:06,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:40:06,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:40:06,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:40:06,909 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:40:06,910 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:40:06,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:40:06 BoogieIcfgContainer [2020-10-13 14:40:06,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:40:06,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:40:06,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:40:06,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:40:06,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:40:05" (1/3) ... [2020-10-13 14:40:06,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf33415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:40:06, skipping insertion in model container [2020-10-13 14:40:06,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:40:06" (2/3) ... [2020-10-13 14:40:06,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bf33415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:40:06, skipping insertion in model container [2020-10-13 14:40:06,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:40:06" (3/3) ... [2020-10-13 14:40:06,924 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:40:06,936 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:40:06,944 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:40:06,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:40:06,986 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:40:06,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:40:06,987 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:40:06,987 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:40:06,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:40:06,988 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:40:06,988 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:40:06,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:40:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-13 14:40:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 14:40:07,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:07,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:07,024 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash 755670559, now seen corresponding path program 1 times [2020-10-13 14:40:07,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:07,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824488414] [2020-10-13 14:40:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:09,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 14:40:09,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:40:09,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-13 14:40:09,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:09,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:09,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:40:09,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:40:09,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:40:09,481 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:09,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:09,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:09,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:09,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:40:09,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:09,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:09,528 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 14:40:09,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824488414] [2020-10-13 14:40:09,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:09,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235862201] [2020-10-13 14:40:09,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:09,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:09,565 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-10-13 14:40:09,775 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:40:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:10,306 INFO L93 Difference]: Finished difference Result 273 states and 432 transitions. [2020-10-13 14:40:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:10,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 14:40:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:10,323 INFO L225 Difference]: With dead ends: 273 [2020-10-13 14:40:10,323 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 14:40:10,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 14:40:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-13 14:40:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 14:40:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 263 transitions. [2020-10-13 14:40:10,394 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 263 transitions. Word has length 53 [2020-10-13 14:40:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:10,395 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 263 transitions. [2020-10-13 14:40:10,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 263 transitions. [2020-10-13 14:40:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:40:10,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:10,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:10,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:40:10,398 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1692165258, now seen corresponding path program 1 times [2020-10-13 14:40:10,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:10,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201433092] [2020-10-13 14:40:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:10,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:11,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:11,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:40:11,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:40:11,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-13 14:40:11,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:40:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:40:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:11,246 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:11,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:11,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:11,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:11,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:11,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:40:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:11,274 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 14:40:11,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201433092] [2020-10-13 14:40:11,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:11,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:11,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302275972] [2020-10-13 14:40:11,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:11,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:11,278 INFO L87 Difference]: Start difference. First operand 177 states and 263 transitions. Second operand 4 states. [2020-10-13 14:40:11,408 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:40:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:11,873 INFO L93 Difference]: Finished difference Result 437 states and 675 transitions. [2020-10-13 14:40:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:11,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:40:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:11,877 INFO L225 Difference]: With dead ends: 437 [2020-10-13 14:40:11,877 INFO L226 Difference]: Without dead ends: 291 [2020-10-13 14:40:11,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-13 14:40:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2020-10-13 14:40:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-13 14:40:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 440 transitions. [2020-10-13 14:40:11,917 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 440 transitions. Word has length 54 [2020-10-13 14:40:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:11,918 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 440 transitions. [2020-10-13 14:40:11,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 440 transitions. [2020-10-13 14:40:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 14:40:11,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:11,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:11,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:40:11,923 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash -936990392, now seen corresponding path program 1 times [2020-10-13 14:40:11,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:11,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454372705] [2020-10-13 14:40:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:12,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 14:40:12,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:40:12,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-13 14:40:12,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:12,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:12,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:40:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:40:12,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:12,482 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:12,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:12,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:12,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:12,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:40:12,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:12,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:12,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:12,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:12,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:12,512 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 14:40:12,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454372705] [2020-10-13 14:40:12,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:12,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:12,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732057254] [2020-10-13 14:40:12,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:12,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:12,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:12,516 INFO L87 Difference]: Start difference. First operand 289 states and 440 transitions. Second operand 4 states. [2020-10-13 14:40:12,691 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:40:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:13,178 INFO L93 Difference]: Finished difference Result 741 states and 1154 transitions. [2020-10-13 14:40:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:13,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-13 14:40:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:13,182 INFO L225 Difference]: With dead ends: 741 [2020-10-13 14:40:13,183 INFO L226 Difference]: Without dead ends: 483 [2020-10-13 14:40:13,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-13 14:40:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 481. [2020-10-13 14:40:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-13 14:40:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 740 transitions. [2020-10-13 14:40:13,227 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 740 transitions. Word has length 55 [2020-10-13 14:40:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:13,227 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 740 transitions. [2020-10-13 14:40:13,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 740 transitions. [2020-10-13 14:40:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 14:40:13,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:13,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:13,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:40:13,229 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:13,230 INFO L82 PathProgramCache]: Analyzing trace with hash 470821239, now seen corresponding path program 1 times [2020-10-13 14:40:13,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:13,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553651085] [2020-10-13 14:40:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:14,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 14:40:14,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:40:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-10-13 14:40:14,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:40:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:40:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:40:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:14,346 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:14,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:14,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:14,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:14,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:40:14,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:14,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:14,389 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 14:40:14,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553651085] [2020-10-13 14:40:14,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:14,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:40:14,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074340460] [2020-10-13 14:40:14,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:40:14,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:40:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:40:14,392 INFO L87 Difference]: Start difference. First operand 481 states and 740 transitions. Second operand 7 states. [2020-10-13 14:40:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:15,540 INFO L93 Difference]: Finished difference Result 2037 states and 3176 transitions. [2020-10-13 14:40:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:40:15,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-13 14:40:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:15,550 INFO L225 Difference]: With dead ends: 2037 [2020-10-13 14:40:15,551 INFO L226 Difference]: Without dead ends: 1587 [2020-10-13 14:40:15,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:40:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2020-10-13 14:40:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1581. [2020-10-13 14:40:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-13 14:40:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2456 transitions. [2020-10-13 14:40:15,667 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2456 transitions. Word has length 56 [2020-10-13 14:40:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:15,669 INFO L479 AbstractCegarLoop]: Abstraction has 1581 states and 2456 transitions. [2020-10-13 14:40:15,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:40:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2456 transitions. [2020-10-13 14:40:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:40:15,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:15,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:15,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:40:15,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1571978246, now seen corresponding path program 1 times [2020-10-13 14:40:15,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:15,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885437241] [2020-10-13 14:40:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:15,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:16,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:40:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:40:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-13 14:40:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:40:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:40:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:16,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:16,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:16,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:16,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:16,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:40:16,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:16,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:16,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:16,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:16,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:16,489 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 14:40:16,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885437241] [2020-10-13 14:40:16,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:16,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:16,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142064751] [2020-10-13 14:40:16,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:16,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:16,492 INFO L87 Difference]: Start difference. First operand 1581 states and 2456 transitions. Second operand 4 states. [2020-10-13 14:40:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:17,356 INFO L93 Difference]: Finished difference Result 4145 states and 6442 transitions. [2020-10-13 14:40:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:17,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:40:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:17,371 INFO L225 Difference]: With dead ends: 4145 [2020-10-13 14:40:17,371 INFO L226 Difference]: Without dead ends: 2595 [2020-10-13 14:40:17,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2020-10-13 14:40:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2593. [2020-10-13 14:40:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2593 states. [2020-10-13 14:40:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3984 transitions. [2020-10-13 14:40:17,527 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3984 transitions. Word has length 57 [2020-10-13 14:40:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:17,528 INFO L479 AbstractCegarLoop]: Abstraction has 2593 states and 3984 transitions. [2020-10-13 14:40:17,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3984 transitions. [2020-10-13 14:40:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:40:17,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:17,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:17,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:40:17,531 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1903315104, now seen corresponding path program 1 times [2020-10-13 14:40:17,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:17,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140191395] [2020-10-13 14:40:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:17,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:18,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:18,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:40:18,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:40:18,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-13 14:40:18,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:40:18,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:40:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:40:18,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:40:18,578 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:18,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:18,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:18,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:18,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:18,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:18,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:40:18,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:18,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:40:18,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:18,623 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 14:40:18,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140191395] [2020-10-13 14:40:18,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:18,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:40:18,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748458967] [2020-10-13 14:40:18,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:40:18,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:40:18,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:40:18,625 INFO L87 Difference]: Start difference. First operand 2593 states and 3984 transitions. Second operand 6 states. [2020-10-13 14:40:18,770 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 14:40:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:19,514 INFO L93 Difference]: Finished difference Result 7661 states and 11778 transitions. [2020-10-13 14:40:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:40:19,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 14:40:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:19,540 INFO L225 Difference]: With dead ends: 7661 [2020-10-13 14:40:19,540 INFO L226 Difference]: Without dead ends: 5099 [2020-10-13 14:40:19,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:40:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2020-10-13 14:40:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 5097. [2020-10-13 14:40:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5097 states. [2020-10-13 14:40:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 7768 transitions. [2020-10-13 14:40:19,943 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 7768 transitions. Word has length 58 [2020-10-13 14:40:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:19,943 INFO L479 AbstractCegarLoop]: Abstraction has 5097 states and 7768 transitions. [2020-10-13 14:40:19,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:40:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 7768 transitions. [2020-10-13 14:40:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:40:19,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:19,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:19,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:40:19,946 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1406221637, now seen corresponding path program 1 times [2020-10-13 14:40:19,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:19,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354606174] [2020-10-13 14:40:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:19,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:20,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:40:20,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:20,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 14:40:20,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:40:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:40:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:40:20,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:20,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:20,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:20,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:20,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:20,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:40:20,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:20,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:20,391 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 14:40:20,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354606174] [2020-10-13 14:40:20,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:20,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:40:20,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071772774] [2020-10-13 14:40:20,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:40:20,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:20,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:40:20,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:40:20,395 INFO L87 Difference]: Start difference. First operand 5097 states and 7768 transitions. Second operand 7 states. [2020-10-13 14:40:20,545 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 14:40:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:21,851 INFO L93 Difference]: Finished difference Result 23299 states and 35565 transitions. [2020-10-13 14:40:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:40:21,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-13 14:40:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:21,937 INFO L225 Difference]: With dead ends: 23299 [2020-10-13 14:40:21,937 INFO L226 Difference]: Without dead ends: 18233 [2020-10-13 14:40:21,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:40:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2020-10-13 14:40:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 10161. [2020-10-13 14:40:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10161 states. [2020-10-13 14:40:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10161 states to 10161 states and 15248 transitions. [2020-10-13 14:40:22,812 INFO L78 Accepts]: Start accepts. Automaton has 10161 states and 15248 transitions. Word has length 58 [2020-10-13 14:40:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:22,813 INFO L479 AbstractCegarLoop]: Abstraction has 10161 states and 15248 transitions. [2020-10-13 14:40:22,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:40:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 10161 states and 15248 transitions. [2020-10-13 14:40:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:40:22,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:22,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:22,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:40:22,815 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 624665037, now seen corresponding path program 1 times [2020-10-13 14:40:22,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:22,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905450813] [2020-10-13 14:40:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:22,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:22,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:40:22,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:22,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-13 14:40:22,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:40:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 14:40:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:40:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:23,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:23,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:23,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:23,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:23,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:40:23,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:23,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:23,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:23,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:23,178 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 14:40:23,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905450813] [2020-10-13 14:40:23,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:23,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:40:23,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919300899] [2020-10-13 14:40:23,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:40:23,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:23,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:40:23,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:23,268 INFO L87 Difference]: Start difference. First operand 10161 states and 15248 transitions. Second operand 5 states. [2020-10-13 14:40:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:24,782 INFO L93 Difference]: Finished difference Result 20803 states and 30977 transitions. [2020-10-13 14:40:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:40:24,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-13 14:40:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:24,832 INFO L225 Difference]: With dead ends: 20803 [2020-10-13 14:40:24,832 INFO L226 Difference]: Without dead ends: 20801 [2020-10-13 14:40:24,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:40:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20801 states. [2020-10-13 14:40:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20801 to 10673. [2020-10-13 14:40:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10673 states. [2020-10-13 14:40:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10673 states to 10673 states and 15760 transitions. [2020-10-13 14:40:25,779 INFO L78 Accepts]: Start accepts. Automaton has 10673 states and 15760 transitions. Word has length 59 [2020-10-13 14:40:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:25,779 INFO L479 AbstractCegarLoop]: Abstraction has 10673 states and 15760 transitions. [2020-10-13 14:40:25,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:40:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10673 states and 15760 transitions. [2020-10-13 14:40:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:40:25,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:25,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:25,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:40:25,781 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2100600588, now seen corresponding path program 1 times [2020-10-13 14:40:25,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:25,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402347654] [2020-10-13 14:40:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:25,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 14:40:25,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:25,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:25,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:40:25,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:40:25,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:40:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:26,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:26,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:26,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:26,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:40:26,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:26,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:26,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:26,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:26,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:26,059 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 14:40:26,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402347654] [2020-10-13 14:40:26,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:26,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:26,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808095964] [2020-10-13 14:40:26,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:26,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:26,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:26,062 INFO L87 Difference]: Start difference. First operand 10673 states and 15760 transitions. Second operand 4 states. [2020-10-13 14:40:26,204 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 14:40:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:27,320 INFO L93 Difference]: Finished difference Result 23791 states and 35080 transitions. [2020-10-13 14:40:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:27,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-13 14:40:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:27,352 INFO L225 Difference]: With dead ends: 23791 [2020-10-13 14:40:27,353 INFO L226 Difference]: Without dead ends: 13149 [2020-10-13 14:40:27,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13149 states. [2020-10-13 14:40:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13149 to 13091. [2020-10-13 14:40:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13091 states. [2020-10-13 14:40:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13091 states to 13091 states and 19182 transitions. [2020-10-13 14:40:28,887 INFO L78 Accepts]: Start accepts. Automaton has 13091 states and 19182 transitions. Word has length 60 [2020-10-13 14:40:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:28,888 INFO L479 AbstractCegarLoop]: Abstraction has 13091 states and 19182 transitions. [2020-10-13 14:40:28,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13091 states and 19182 transitions. [2020-10-13 14:40:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:40:28,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:28,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:28,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:40:28,896 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1625509601, now seen corresponding path program 1 times [2020-10-13 14:40:28,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:28,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868730387] [2020-10-13 14:40:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:28,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:30,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:40:30,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:40:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1410 [2020-10-13 14:40:30,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:40:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:40:30,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:40:30,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:30,679 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:30,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:30,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:30,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:40:30,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:30,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:30,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868730387] [2020-10-13 14:40:30,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:40:30,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:40:30,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309994310] [2020-10-13 14:40:30,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:40:30,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:40:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:40:30,721 INFO L87 Difference]: Start difference. First operand 13091 states and 19182 transitions. Second operand 9 states. [2020-10-13 14:40:30,940 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:40:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:38,791 INFO L93 Difference]: Finished difference Result 84437 states and 122445 transitions. [2020-10-13 14:40:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:40:38,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-13 14:40:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:38,958 INFO L225 Difference]: With dead ends: 84437 [2020-10-13 14:40:38,958 INFO L226 Difference]: Without dead ends: 71379 [2020-10-13 14:40:39,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:40:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71379 states. [2020-10-13 14:40:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71379 to 22419. [2020-10-13 14:40:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22419 states. [2020-10-13 14:40:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22419 states to 22419 states and 32594 transitions. [2020-10-13 14:40:41,085 INFO L78 Accepts]: Start accepts. Automaton has 22419 states and 32594 transitions. Word has length 83 [2020-10-13 14:40:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:41,086 INFO L479 AbstractCegarLoop]: Abstraction has 22419 states and 32594 transitions. [2020-10-13 14:40:41,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:40:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 22419 states and 32594 transitions. [2020-10-13 14:40:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:40:41,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:41,094 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 14:40:41,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:40:41,095 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1008248663, now seen corresponding path program 1 times [2020-10-13 14:40:41,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:41,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408457795] [2020-10-13 14:40:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:41,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:46,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:46,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:40:46,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:40:46,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:40:46,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:40:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:40:46,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:46,319 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:46,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:46,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:46,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:40:46,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:46,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:46,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:46,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408457795] [2020-10-13 14:40:46,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:46,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:46,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625996039] [2020-10-13 14:40:46,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:46,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:46,359 INFO L87 Difference]: Start difference. First operand 22419 states and 32594 transitions. Second operand 4 states. [2020-10-13 14:40:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:48,586 INFO L93 Difference]: Finished difference Result 40460 states and 59121 transitions. [2020-10-13 14:40:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:40:48,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-13 14:40:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:48,617 INFO L225 Difference]: With dead ends: 40460 [2020-10-13 14:40:48,618 INFO L226 Difference]: Without dead ends: 18074 [2020-10-13 14:40:48,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18074 states. [2020-10-13 14:40:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18074 to 18072. [2020-10-13 14:40:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18072 states. [2020-10-13 14:40:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 26327 transitions. [2020-10-13 14:40:50,258 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 26327 transitions. Word has length 83 [2020-10-13 14:40:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:50,259 INFO L479 AbstractCegarLoop]: Abstraction has 18072 states and 26327 transitions. [2020-10-13 14:40:50,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 26327 transitions. [2020-10-13 14:40:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:40:50,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:50,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:50,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:40:50,266 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 396087096, now seen corresponding path program 1 times [2020-10-13 14:40:50,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:50,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528847985] [2020-10-13 14:40:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:50,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:50,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:50,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:50,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:40:50,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:40:50,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-13 14:40:50,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:50,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:40:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:40:50,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 14:40:50,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:50,785 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:40:50,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:50,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:50,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:50,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:50,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:50,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:40:50,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:50,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:50,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:40:50,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:40:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 14:40:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528847985] [2020-10-13 14:40:50,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:50,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:40:50,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403752632] [2020-10-13 14:40:50,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:40:50,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:40:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:40:50,847 INFO L87 Difference]: Start difference. First operand 18072 states and 26327 transitions. Second operand 6 states. [2020-10-13 14:40:51,005 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-13 14:40:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:53,978 INFO L93 Difference]: Finished difference Result 53541 states and 77878 transitions. [2020-10-13 14:40:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:40:53,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-13 14:40:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:54,031 INFO L225 Difference]: With dead ends: 53541 [2020-10-13 14:40:54,031 INFO L226 Difference]: Without dead ends: 35538 [2020-10-13 14:40:54,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:40:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35538 states. [2020-10-13 14:40:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35538 to 35536. [2020-10-13 14:40:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35536 states. [2020-10-13 14:40:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35536 states to 35536 states and 51298 transitions. [2020-10-13 14:40:56,900 INFO L78 Accepts]: Start accepts. Automaton has 35536 states and 51298 transitions. Word has length 83 [2020-10-13 14:40:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:56,900 INFO L479 AbstractCegarLoop]: Abstraction has 35536 states and 51298 transitions. [2020-10-13 14:40:56,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:40:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 35536 states and 51298 transitions. [2020-10-13 14:40:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:40:56,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:56,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:40:56,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:40:56,908 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 126811997, now seen corresponding path program 1 times [2020-10-13 14:40:56,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:56,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501481399] [2020-10-13 14:40:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:56,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:58,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:58,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:40:58,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:40:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-13 14:40:58,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:40:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:40:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 14:40:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:58,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:58,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:58,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:40:58,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:58,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:58,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:59,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501481399] [2020-10-13 14:40:59,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:40:59,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:40:59,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998783408] [2020-10-13 14:40:59,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:40:59,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:40:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:40:59,022 INFO L87 Difference]: Start difference. First operand 35536 states and 51298 transitions. Second operand 9 states. [2020-10-13 14:40:59,183 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:41:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:16,259 INFO L93 Difference]: Finished difference Result 189316 states and 270696 transitions. [2020-10-13 14:41:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:41:16,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-13 14:41:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:16,450 INFO L225 Difference]: With dead ends: 189316 [2020-10-13 14:41:16,450 INFO L226 Difference]: Without dead ends: 162010 [2020-10-13 14:41:16,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:41:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162010 states. [2020-10-13 14:41:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162010 to 59468. [2020-10-13 14:41:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59468 states. [2020-10-13 14:41:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59468 states to 59468 states and 85462 transitions. [2020-10-13 14:41:24,597 INFO L78 Accepts]: Start accepts. Automaton has 59468 states and 85462 transitions. Word has length 83 [2020-10-13 14:41:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:24,598 INFO L479 AbstractCegarLoop]: Abstraction has 59468 states and 85462 transitions. [2020-10-13 14:41:24,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:41:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 59468 states and 85462 transitions. [2020-10-13 14:41:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:41:24,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:24,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:24,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:41:24,605 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 606046758, now seen corresponding path program 1 times [2020-10-13 14:41:24,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:24,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734572888] [2020-10-13 14:41:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:24,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:24,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:25,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:41:25,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:41:25,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-13 14:41:25,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:41:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:41:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:41:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:25,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:25,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:25,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:25,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:25,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:41:25,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:41:25,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 14:41:25,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734572888] [2020-10-13 14:41:25,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:25,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:25,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855401653] [2020-10-13 14:41:25,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:41:25,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:41:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:25,222 INFO L87 Difference]: Start difference. First operand 59468 states and 85462 transitions. Second operand 6 states. [2020-10-13 14:41:25,370 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 14:41:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:38,598 INFO L93 Difference]: Finished difference Result 177870 states and 255702 transitions. [2020-10-13 14:41:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:38,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-13 14:41:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:38,772 INFO L225 Difference]: With dead ends: 177870 [2020-10-13 14:41:38,773 INFO L226 Difference]: Without dead ends: 118540 [2020-10-13 14:41:38,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118540 states. [2020-10-13 14:41:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118540 to 118538. [2020-10-13 14:41:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118538 states. [2020-10-13 14:41:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118538 states to 118538 states and 169525 transitions. [2020-10-13 14:41:52,292 INFO L78 Accepts]: Start accepts. Automaton has 118538 states and 169525 transitions. Word has length 83 [2020-10-13 14:41:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:52,292 INFO L479 AbstractCegarLoop]: Abstraction has 118538 states and 169525 transitions. [2020-10-13 14:41:52,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:41:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 118538 states and 169525 transitions. [2020-10-13 14:41:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:41:52,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:52,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:41:52,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:41:52,300 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:52,300 INFO L82 PathProgramCache]: Analyzing trace with hash -461498655, now seen corresponding path program 1 times [2020-10-13 14:41:52,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:52,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179021282] [2020-10-13 14:41:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:52,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:53,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:53,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:41:53,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:41:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-13 14:41:53,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:41:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:41:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 14:41:53,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:53,537 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:41:53,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:53,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:53,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:53,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:53,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:53,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:41:53,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:53,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:53,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:41:53,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179021282] [2020-10-13 14:41:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:41:53,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:41:53,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68044681] [2020-10-13 14:41:53,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:41:53,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:41:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:53,592 INFO L87 Difference]: Start difference. First operand 118538 states and 169525 transitions. Second operand 9 states. [2020-10-13 14:41:53,833 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-13 14:42:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:42:50,840 INFO L93 Difference]: Finished difference Result 506789 states and 715008 transitions. [2020-10-13 14:42:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:42:50,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-13 14:42:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:42:51,552 INFO L225 Difference]: With dead ends: 506789 [2020-10-13 14:42:51,552 INFO L226 Difference]: Without dead ends: 457543 [2020-10-13 14:42:51,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:42:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457543 states. [2020-10-13 14:43:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457543 to 191852. [2020-10-13 14:43:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191852 states. [2020-10-13 14:43:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191852 states to 191852 states and 273189 transitions. [2020-10-13 14:43:21,849 INFO L78 Accepts]: Start accepts. Automaton has 191852 states and 273189 transitions. Word has length 83 [2020-10-13 14:43:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:43:21,850 INFO L479 AbstractCegarLoop]: Abstraction has 191852 states and 273189 transitions. [2020-10-13 14:43:21,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:43:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 191852 states and 273189 transitions. [2020-10-13 14:43:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:43:21,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:43:21,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:43:21,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:43:21,860 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:43:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:43:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1732082376, now seen corresponding path program 1 times [2020-10-13 14:43:21,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:43:21,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931293742] [2020-10-13 14:43:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:43:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:21,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:22,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:22,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:43:22,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:43:22,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-13 14:43:22,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:43:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:43:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:43:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:43:22,323 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:43:22,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:43:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:43:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:43:22,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:43:22,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:43:22,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:43:22,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 14:43:22,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:43:22,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:43:22,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:43:22,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:43:22,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:43:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:43:22,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931293742] [2020-10-13 14:43:22,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:43:22,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:43:22,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037433478] [2020-10-13 14:43:22,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:43:22,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:43:22,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:43:22,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:43:22,385 INFO L87 Difference]: Start difference. First operand 191852 states and 273189 transitions. Second operand 6 states. [2020-10-13 14:43:22,600 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 124