/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:12:33,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:12:33,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:12:33,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:12:33,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:12:33,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:12:33,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:12:33,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:12:33,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:12:33,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:12:33,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:12:33,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:12:33,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:12:33,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:12:33,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:12:33,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:12:33,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:12:33,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:12:33,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:12:33,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:12:33,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:12:33,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:12:33,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:12:33,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:12:33,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:12:33,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:12:33,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:12:33,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:12:33,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:12:33,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:12:33,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:12:33,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:12:33,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:12:33,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:12:33,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:12:33,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:12:33,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:12:33,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:12:33,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:12:33,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:12:33,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:12:33,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:12:33,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:12:33,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:12:33,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:12:33,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:12:33,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:12:33,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:12:33,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:12:33,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:12:33,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:12:33,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:12:33,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:12:33,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:12:33,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:12:33,328 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:12:33,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:12:33,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:12:33,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:12:33,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:12:33,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:12:33,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:12:33,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:12:33,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:12:33,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:12:33,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:12:33,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:12:33,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:12:33,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:12:33,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:12:33,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:12:33,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:12:33,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:12:33,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:12:33,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:12:33,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:12:33,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:12:33,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:12:33,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db9731769/b393aa4ad66b4db88980694b1350fbf4/FLAG5eb9ac6d4 [2020-10-12 19:12:34,268 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:12:34,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:12:34,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db9731769/b393aa4ad66b4db88980694b1350fbf4/FLAG5eb9ac6d4 [2020-10-12 19:12:34,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db9731769/b393aa4ad66b4db88980694b1350fbf4 [2020-10-12 19:12:34,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:12:34,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:12:34,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:12:34,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:12:34,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:12:34,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:12:34" (1/1) ... [2020-10-12 19:12:34,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78884b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:34, skipping insertion in model container [2020-10-12 19:12:34,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:12:34" (1/1) ... [2020-10-12 19:12:34,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:12:34,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:12:34,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:12:34,993 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:12:35,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:12:35,113 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:12:35,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35 WrapperNode [2020-10-12 19:12:35,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:12:35,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:12:35,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:12:35,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:12:35,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... [2020-10-12 19:12:35,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:12:35,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:12:35,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:12:35,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:12:35,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:12:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:12:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:12:35,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:12:35,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:12:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:12:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:12:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:12:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:12:35,249 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:12:35,250 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:12:35,250 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:12:35,250 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:12:35,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:12:35,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:12:35,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:12:36,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:12:36,120 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:12:36,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:12:36 BoogieIcfgContainer [2020-10-12 19:12:36,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:12:36,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:12:36,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:12:36,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:12:36,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:12:34" (1/3) ... [2020-10-12 19:12:36,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e6cd86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:12:36, skipping insertion in model container [2020-10-12 19:12:36,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:12:35" (2/3) ... [2020-10-12 19:12:36,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e6cd86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:12:36, skipping insertion in model container [2020-10-12 19:12:36,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:12:36" (3/3) ... [2020-10-12 19:12:36,137 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:12:36,147 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:12:36,157 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:12:36,173 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:12:36,197 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:12:36,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:12:36,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:12:36,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:12:36,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:12:36,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:12:36,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:12:36,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:12:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-12 19:12:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:12:36,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:36,233 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] [2020-10-12 19:12:36,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-12 19:12:36,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:36,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367818429] [2020-10-12 19:12:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:36,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:36,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:37,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:39,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:39,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:12:39,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:12:39,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2409 [2020-10-12 19:12:39,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:12:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:12:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:12:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:12:39,376 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:39,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:39,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:39,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:39,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:12:39,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:39,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:39,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:39,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367818429] [2020-10-12 19:12:39,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:39,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:12:39,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160656711] [2020-10-12 19:12:39,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:12:39,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:12:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:12:39,450 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 6 states. [2020-10-12 19:12:39,742 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-12 19:12:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:40,682 INFO L93 Difference]: Finished difference Result 659 states and 1106 transitions. [2020-10-12 19:12:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:12:40,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 19:12:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:40,704 INFO L225 Difference]: With dead ends: 659 [2020-10-12 19:12:40,704 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 19:12:40,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:12:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 19:12:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 222. [2020-10-12 19:12:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 19:12:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 353 transitions. [2020-10-12 19:12:40,783 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 353 transitions. Word has length 60 [2020-10-12 19:12:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:40,784 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 353 transitions. [2020-10-12 19:12:40,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:12:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 353 transitions. [2020-10-12 19:12:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:12:40,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:40,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:40,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:12:40,788 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1643393529, now seen corresponding path program 1 times [2020-10-12 19:12:40,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:40,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724806532] [2020-10-12 19:12:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:40,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:41,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:43,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:43,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:12:43,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:12:43,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2756 [2020-10-12 19:12:43,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:12:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:12:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:12:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:12:43,890 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:43,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:43,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:43,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:43,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:43,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:43,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:12:43,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:43,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:43,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:43,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:43,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:43,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724806532] [2020-10-12 19:12:43,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:43,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:12:43,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421480814] [2020-10-12 19:12:43,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:12:43,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:43,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:12:43,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:43,930 INFO L87 Difference]: Start difference. First operand 222 states and 353 transitions. Second operand 7 states. [2020-10-12 19:12:44,168 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:12:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:45,678 INFO L93 Difference]: Finished difference Result 1378 states and 2286 transitions. [2020-10-12 19:12:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:12:45,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-12 19:12:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:45,686 INFO L225 Difference]: With dead ends: 1378 [2020-10-12 19:12:45,687 INFO L226 Difference]: Without dead ends: 1214 [2020-10-12 19:12:45,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:12:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2020-10-12 19:12:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 645. [2020-10-12 19:12:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-12 19:12:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1062 transitions. [2020-10-12 19:12:45,749 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1062 transitions. Word has length 61 [2020-10-12 19:12:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:45,749 INFO L479 AbstractCegarLoop]: Abstraction has 645 states and 1062 transitions. [2020-10-12 19:12:45,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:12:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1062 transitions. [2020-10-12 19:12:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:12:45,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:45,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:45,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:12:45,753 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:45,754 INFO L82 PathProgramCache]: Analyzing trace with hash 537355724, now seen corresponding path program 1 times [2020-10-12 19:12:45,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:45,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402140444] [2020-10-12 19:12:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:45,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:45,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:46,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:46,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:47,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:47,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:12:47,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:12:47,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2188 [2020-10-12 19:12:47,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:47,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:12:47,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:12:47,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 19:12:47,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:48,320 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:48,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:48,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:48,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:48,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:48,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:48,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:12:48,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:48,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:12:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:48,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402140444] [2020-10-12 19:12:48,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:48,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:12:48,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674585598] [2020-10-12 19:12:48,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:12:48,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:12:48,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:48,378 INFO L87 Difference]: Start difference. First operand 645 states and 1062 transitions. Second operand 7 states. [2020-10-12 19:12:48,652 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:12:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:49,915 INFO L93 Difference]: Finished difference Result 3961 states and 6593 transitions. [2020-10-12 19:12:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:12:49,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-12 19:12:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:49,934 INFO L225 Difference]: With dead ends: 3961 [2020-10-12 19:12:49,935 INFO L226 Difference]: Without dead ends: 3426 [2020-10-12 19:12:49,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:12:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2020-10-12 19:12:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1851. [2020-10-12 19:12:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1851 states. [2020-10-12 19:12:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3069 transitions. [2020-10-12 19:12:50,099 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3069 transitions. Word has length 62 [2020-10-12 19:12:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:50,100 INFO L479 AbstractCegarLoop]: Abstraction has 1851 states and 3069 transitions. [2020-10-12 19:12:50,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:12:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3069 transitions. [2020-10-12 19:12:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:12:50,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:50,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:50,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:12:50,104 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -574336146, now seen corresponding path program 1 times [2020-10-12 19:12:50,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:50,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949289031] [2020-10-12 19:12:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:50,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:50,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:50,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:50,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:52,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:52,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:12:52,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:12:52,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2256 [2020-10-12 19:12:52,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:12:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:12:52,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:12:52,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:52,643 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:52,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:52,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:52,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:52,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:12:52,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:52,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:52,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:52,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:52,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:52,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949289031] [2020-10-12 19:12:52,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:52,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:12:52,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421240205] [2020-10-12 19:12:52,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:12:52,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:52,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:12:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:52,690 INFO L87 Difference]: Start difference. First operand 1851 states and 3069 transitions. Second operand 7 states. [2020-10-12 19:12:52,919 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:12:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:54,834 INFO L93 Difference]: Finished difference Result 11254 states and 18688 transitions. [2020-10-12 19:12:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:12:54,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-12 19:12:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:54,886 INFO L225 Difference]: With dead ends: 11254 [2020-10-12 19:12:54,886 INFO L226 Difference]: Without dead ends: 9555 [2020-10-12 19:12:54,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:12:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2020-10-12 19:12:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 5170. [2020-10-12 19:12:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5170 states. [2020-10-12 19:12:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 8561 transitions. [2020-10-12 19:12:55,377 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 8561 transitions. Word has length 63 [2020-10-12 19:12:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:55,378 INFO L479 AbstractCegarLoop]: Abstraction has 5170 states and 8561 transitions. [2020-10-12 19:12:55,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:12:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 8561 transitions. [2020-10-12 19:12:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:12:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:55,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:55,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:12:55,381 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 224317013, now seen corresponding path program 1 times [2020-10-12 19:12:55,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:55,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784916515] [2020-10-12 19:12:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:55,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:55,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:55,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:55,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:55,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:00,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:13:00,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:13:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:13:00,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:13:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:13:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:13:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:00,722 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:00,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:00,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:00,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:00,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:00,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:00,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:13:00,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:13:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:00,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784916515] [2020-10-12 19:13:00,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:00,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:13:00,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636598524] [2020-10-12 19:13:00,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:13:00,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:00,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:13:00,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:13:00,762 INFO L87 Difference]: Start difference. First operand 5170 states and 8561 transitions. Second operand 6 states. [2020-10-12 19:13:00,963 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:13:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:02,929 INFO L93 Difference]: Finished difference Result 20130 states and 33353 transitions. [2020-10-12 19:13:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:13:02,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:13:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:03,000 INFO L225 Difference]: With dead ends: 20130 [2020-10-12 19:13:03,000 INFO L226 Difference]: Without dead ends: 15113 [2020-10-12 19:13:03,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:13:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15113 states. [2020-10-12 19:13:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15113 to 9858. [2020-10-12 19:13:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9858 states. [2020-10-12 19:13:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 16293 transitions. [2020-10-12 19:13:03,743 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 16293 transitions. Word has length 65 [2020-10-12 19:13:03,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:03,744 INFO L479 AbstractCegarLoop]: Abstraction has 9858 states and 16293 transitions. [2020-10-12 19:13:03,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:13:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 16293 transitions. [2020-10-12 19:13:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:13:03,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:03,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:03,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:13:03,746 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash 624109630, now seen corresponding path program 1 times [2020-10-12 19:13:03,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:03,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950444426] [2020-10-12 19:13:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:03,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:04,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:04,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:04,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:13:04,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:13:04,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-12 19:13:04,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:04,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:13:04,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:13:04,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:13:04,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:05,149 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:05,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:05,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:05,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:05,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:05,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:13:05,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:05,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:05,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:05,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950444426] [2020-10-12 19:13:05,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:05,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:13:05,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989812176] [2020-10-12 19:13:05,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:13:05,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:05,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:13:05,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:13:05,191 INFO L87 Difference]: Start difference. First operand 9858 states and 16293 transitions. Second operand 6 states. [2020-10-12 19:13:05,439 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:13:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:07,255 INFO L93 Difference]: Finished difference Result 31208 states and 51585 transitions. [2020-10-12 19:13:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:13:07,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:13:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:07,319 INFO L225 Difference]: With dead ends: 31208 [2020-10-12 19:13:07,320 INFO L226 Difference]: Without dead ends: 21503 [2020-10-12 19:13:07,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:13:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21503 states. [2020-10-12 19:13:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21503 to 9858. [2020-10-12 19:13:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9858 states. [2020-10-12 19:13:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 16277 transitions. [2020-10-12 19:13:08,261 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 16277 transitions. Word has length 65 [2020-10-12 19:13:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:08,262 INFO L479 AbstractCegarLoop]: Abstraction has 9858 states and 16277 transitions. [2020-10-12 19:13:08,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:13:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 16277 transitions. [2020-10-12 19:13:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:13:08,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:08,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:08,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:13:08,264 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -280562700, now seen corresponding path program 1 times [2020-10-12 19:13:08,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:08,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163218367] [2020-10-12 19:13:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:08,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:08,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:08,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:08,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:08,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:08,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:11,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:13,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:13,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:13:13,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:13:13,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:13:13,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:13,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:13:13,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:13:13,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:13:13,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:13,499 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:13,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:13,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:13,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:13,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:13,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:13:13,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:13,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:13,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:13,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:13,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:13:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:13,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163218367] [2020-10-12 19:13:13,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:13,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:13:13,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483824637] [2020-10-12 19:13:13,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:13:13,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:13,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:13:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:13:13,548 INFO L87 Difference]: Start difference. First operand 9858 states and 16277 transitions. Second operand 6 states. [2020-10-12 19:13:13,831 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:13:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:15,713 INFO L93 Difference]: Finished difference Result 26804 states and 44228 transitions. [2020-10-12 19:13:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:13:15,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:13:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:15,777 INFO L225 Difference]: With dead ends: 26804 [2020-10-12 19:13:15,777 INFO L226 Difference]: Without dead ends: 21105 [2020-10-12 19:13:15,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:13:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2020-10-12 19:13:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 15810. [2020-10-12 19:13:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15810 states. [2020-10-12 19:13:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 26091 transitions. [2020-10-12 19:13:17,048 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 26091 transitions. Word has length 65 [2020-10-12 19:13:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:17,048 INFO L479 AbstractCegarLoop]: Abstraction has 15810 states and 26091 transitions. [2020-10-12 19:13:17,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:13:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 26091 transitions. [2020-10-12 19:13:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:13:17,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:17,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:17,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:13:17,051 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1743105731, now seen corresponding path program 1 times [2020-10-12 19:13:17,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:17,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067061864] [2020-10-12 19:13:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:17,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:17,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:17,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:17,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:19,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:22,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:13:22,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:13:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:13:22,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:13:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:13:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:13:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:22,333 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:22,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:22,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:22,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:22,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:22,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:22,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:13:22,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:22,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:22,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:22,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:22,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067061864] [2020-10-12 19:13:22,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:22,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:13:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013207439] [2020-10-12 19:13:22,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:13:22,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:22,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:13:22,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:13:22,370 INFO L87 Difference]: Start difference. First operand 15810 states and 26091 transitions. Second operand 6 states. [2020-10-12 19:13:22,608 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:13:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:24,767 INFO L93 Difference]: Finished difference Result 31350 states and 51708 transitions. [2020-10-12 19:13:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:13:24,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:13:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:24,842 INFO L225 Difference]: With dead ends: 31350 [2020-10-12 19:13:24,842 INFO L226 Difference]: Without dead ends: 25651 [2020-10-12 19:13:24,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:13:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25651 states. [2020-10-12 19:13:26,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25651 to 19902. [2020-10-12 19:13:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19902 states. [2020-10-12 19:13:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 32851 transitions. [2020-10-12 19:13:26,234 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 32851 transitions. Word has length 65 [2020-10-12 19:13:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:26,234 INFO L479 AbstractCegarLoop]: Abstraction has 19902 states and 32851 transitions. [2020-10-12 19:13:26,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:13:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 32851 transitions. [2020-10-12 19:13:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:13:26,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:26,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:26,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:13:26,236 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1697717641, now seen corresponding path program 1 times [2020-10-12 19:13:26,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:26,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309680231] [2020-10-12 19:13:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:26,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:26,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:26,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:31,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:31,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:13:31,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:13:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 19:13:31,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:13:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:13:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:13:31,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:31,479 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:31,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:31,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:31,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:31,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:31,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:31,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:13:31,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:31,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:31,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309680231] [2020-10-12 19:13:31,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:31,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:13:31,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857277006] [2020-10-12 19:13:31,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:13:31,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:31,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:13:31,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:13:31,527 INFO L87 Difference]: Start difference. First operand 19902 states and 32851 transitions. Second operand 7 states. [2020-10-12 19:13:31,820 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:13:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:34,782 INFO L93 Difference]: Finished difference Result 41548 states and 68600 transitions. [2020-10-12 19:13:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:13:34,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-12 19:13:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:34,855 INFO L225 Difference]: With dead ends: 41548 [2020-10-12 19:13:34,855 INFO L226 Difference]: Without dead ends: 31843 [2020-10-12 19:13:34,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:13:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31843 states. [2020-10-12 19:13:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31843 to 25038. [2020-10-12 19:13:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25038 states. [2020-10-12 19:13:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 41342 transitions. [2020-10-12 19:13:36,747 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 41342 transitions. Word has length 66 [2020-10-12 19:13:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:36,747 INFO L479 AbstractCegarLoop]: Abstraction has 25038 states and 41342 transitions. [2020-10-12 19:13:36,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:13:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 41342 transitions. [2020-10-12 19:13:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:13:36,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:36,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:36,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:13:36,749 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash 926195294, now seen corresponding path program 1 times [2020-10-12 19:13:36,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:36,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142455305] [2020-10-12 19:13:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:36,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:36,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:36,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:13:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 19:13:37,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:13:37,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:37,352 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:37,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:37,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:37,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:37,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:37,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:37,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:13:37,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:37,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:37,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142455305] [2020-10-12 19:13:37,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:37,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:13:37,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710400341] [2020-10-12 19:13:37,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:13:37,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:13:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:13:37,399 INFO L87 Difference]: Start difference. First operand 25038 states and 41342 transitions. Second operand 4 states. [2020-10-12 19:13:37,573 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-12 19:13:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:40,819 INFO L93 Difference]: Finished difference Result 68501 states and 112778 transitions. [2020-10-12 19:13:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:13:40,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-12 19:13:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:40,883 INFO L225 Difference]: With dead ends: 68501 [2020-10-12 19:13:40,883 INFO L226 Difference]: Without dead ends: 43534 [2020-10-12 19:13:40,932 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 [2020-10-12 19:13:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43534 states. [2020-10-12 19:13:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43534 to 43206. [2020-10-12 19:13:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43206 states. [2020-10-12 19:13:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43206 states to 43206 states and 70301 transitions. [2020-10-12 19:13:44,659 INFO L78 Accepts]: Start accepts. Automaton has 43206 states and 70301 transitions. Word has length 66 [2020-10-12 19:13:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:44,659 INFO L479 AbstractCegarLoop]: Abstraction has 43206 states and 70301 transitions. [2020-10-12 19:13:44,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:13:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 43206 states and 70301 transitions. [2020-10-12 19:13:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:13:44,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:44,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:44,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:13:44,661 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash 917084939, now seen corresponding path program 1 times [2020-10-12 19:13:44,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:44,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108332626] [2020-10-12 19:13:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:44,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:44,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:45,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:45,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:48,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:49,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:13:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:49,907 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:49,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:49,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:49,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:13:49,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:49,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:49,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:49,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:49,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:49,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108332626] [2020-10-12 19:13:49,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:49,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:13:49,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530823727] [2020-10-12 19:13:49,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:13:49,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:13:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:13:49,936 INFO L87 Difference]: Start difference. First operand 43206 states and 70301 transitions. Second operand 5 states. [2020-10-12 19:13:50,218 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:13:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:53,567 INFO L93 Difference]: Finished difference Result 80687 states and 131262 transitions. [2020-10-12 19:13:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:13:53,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:13:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:53,620 INFO L225 Difference]: With dead ends: 80687 [2020-10-12 19:13:53,621 INFO L226 Difference]: Without dead ends: 47656 [2020-10-12 19:13:53,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:13:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47656 states. [2020-10-12 19:13:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47656 to 45831. [2020-10-12 19:13:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45831 states. [2020-10-12 19:13:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45831 states to 45831 states and 74645 transitions. [2020-10-12 19:13:57,967 INFO L78 Accepts]: Start accepts. Automaton has 45831 states and 74645 transitions. Word has length 66 [2020-10-12 19:13:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:57,968 INFO L479 AbstractCegarLoop]: Abstraction has 45831 states and 74645 transitions. [2020-10-12 19:13:57,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:13:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45831 states and 74645 transitions. [2020-10-12 19:13:57,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:13:57,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:57,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:57,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:13:57,969 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:57,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:57,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1253642369, now seen corresponding path program 1 times [2020-10-12 19:13:57,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:57,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115959938] [2020-10-12 19:13:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:58,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:58,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:58,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:59,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:59,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:02,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:14:02,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:03,191 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:03,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:03,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:03,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115959938] [2020-10-12 19:14:03,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:03,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:14:03,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524661718] [2020-10-12 19:14:03,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:14:03,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:14:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:14:03,212 INFO L87 Difference]: Start difference. First operand 45831 states and 74645 transitions. Second operand 7 states. [2020-10-12 19:14:03,419 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:14:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:09,303 INFO L93 Difference]: Finished difference Result 99513 states and 162153 transitions. [2020-10-12 19:14:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:09,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:14:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:09,391 INFO L225 Difference]: With dead ends: 99513 [2020-10-12 19:14:09,391 INFO L226 Difference]: Without dead ends: 76310 [2020-10-12 19:14:09,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76310 states. [2020-10-12 19:14:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76310 to 57452. [2020-10-12 19:14:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57452 states. [2020-10-12 19:14:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57452 states to 57452 states and 93592 transitions. [2020-10-12 19:14:13,642 INFO L78 Accepts]: Start accepts. Automaton has 57452 states and 93592 transitions. Word has length 67 [2020-10-12 19:14:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:13,642 INFO L479 AbstractCegarLoop]: Abstraction has 57452 states and 93592 transitions. [2020-10-12 19:14:13,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:14:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 57452 states and 93592 transitions. [2020-10-12 19:14:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:14:13,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:13,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:13,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:14:13,644 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash 155713369, now seen corresponding path program 1 times [2020-10-12 19:14:13,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:13,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902616992] [2020-10-12 19:14:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:13,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:13,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:13,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:13,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:14,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:16,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:18,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:18,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:14:18,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:14:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:14:18,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:14:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:14:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:14:18,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:18,868 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:18,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:18,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:18,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:18,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:18,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:14:18,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:18,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:18,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:18,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902616992] [2020-10-12 19:14:18,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:18,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:14:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27635070] [2020-10-12 19:14:18,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:14:18,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:14:18,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:14:18,904 INFO L87 Difference]: Start difference. First operand 57452 states and 93592 transitions. Second operand 7 states. [2020-10-12 19:14:19,099 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:14:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:26,623 INFO L93 Difference]: Finished difference Result 126260 states and 205772 transitions. [2020-10-12 19:14:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:26,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 19:14:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:26,778 INFO L225 Difference]: With dead ends: 126260 [2020-10-12 19:14:26,778 INFO L226 Difference]: Without dead ends: 94188 [2020-10-12 19:14:26,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94188 states. [2020-10-12 19:14:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94188 to 67318. [2020-10-12 19:14:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67318 states. [2020-10-12 19:14:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67318 states to 67318 states and 109668 transitions. [2020-10-12 19:14:32,159 INFO L78 Accepts]: Start accepts. Automaton has 67318 states and 109668 transitions. Word has length 68 [2020-10-12 19:14:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:32,159 INFO L479 AbstractCegarLoop]: Abstraction has 67318 states and 109668 transitions. [2020-10-12 19:14:32,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:14:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 67318 states and 109668 transitions. [2020-10-12 19:14:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:14:32,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:32,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:14:32,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:14:32,161 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash -653597307, now seen corresponding path program 1 times [2020-10-12 19:14:32,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:32,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587242294] [2020-10-12 19:14:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:32,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:32,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:33,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:33,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:37,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:37,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:14:37,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:14:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:14:37,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:14:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:14:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:14:37,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:37,405 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:14:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:37,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:37,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:37,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:14:37,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587242294] [2020-10-12 19:14:37,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:37,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:14:37,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944680911] [2020-10-12 19:14:37,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:14:37,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:14:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:14:37,430 INFO L87 Difference]: Start difference. First operand 67318 states and 109668 transitions. Second operand 5 states. [2020-10-12 19:14:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:49,637 INFO L93 Difference]: Finished difference Result 198885 states and 323855 transitions. [2020-10-12 19:14:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:14:49,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 19:14:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:49,864 INFO L225 Difference]: With dead ends: 198885 [2020-10-12 19:14:49,864 INFO L226 Difference]: Without dead ends: 131596 [2020-10-12 19:14:49,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:14:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131596 states. [2020-10-12 19:15:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131596 to 131594. [2020-10-12 19:15:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131594 states. [2020-10-12 19:15:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131594 states to 131594 states and 212660 transitions. [2020-10-12 19:15:04,488 INFO L78 Accepts]: Start accepts. Automaton has 131594 states and 212660 transitions. Word has length 69 [2020-10-12 19:15:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:15:04,489 INFO L479 AbstractCegarLoop]: Abstraction has 131594 states and 212660 transitions. [2020-10-12 19:15:04,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:15:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 131594 states and 212660 transitions. [2020-10-12 19:15:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:15:04,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:15:04,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:15:04,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:15:04,493 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:15:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:15:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1288496379, now seen corresponding path program 1 times [2020-10-12 19:15:04,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:15:04,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626903475] [2020-10-12 19:15:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:15:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:04,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:04,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:09,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:09,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 19:15:09,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:09,701 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:15:09,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:15:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:15:09,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:15:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:15:09,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:15:09,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:15:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:15:09,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:15:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:15:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:15:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:15:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:15:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:15:09,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626903475] [2020-10-12 19:15:09,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:15:09,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:15:09,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127774977] [2020-10-12 19:15:09,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:15:09,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:15:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:15:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:15:09,720 INFO L87 Difference]: Start difference. First operand 131594 states and 212660 transitions. Second operand 5 states. [2020-10-12 19:15:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:15:35,446 INFO L93 Difference]: Finished difference Result 371498 states and 598696 transitions. [2020-10-12 19:15:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:15:35,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-12 19:15:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:15:35,848 INFO L225 Difference]: With dead ends: 371498 [2020-10-12 19:15:35,849 INFO L226 Difference]: Without dead ends: 240290 [2020-10-12 19:15:35,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:15:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240290 states. [2020-10-12 19:16:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240290 to 235597. [2020-10-12 19:16:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235597 states. [2020-10-12 19:16:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235597 states to 235597 states and 375320 transitions. [2020-10-12 19:16:02,643 INFO L78 Accepts]: Start accepts. Automaton has 235597 states and 375320 transitions. Word has length 70 [2020-10-12 19:16:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:16:02,644 INFO L479 AbstractCegarLoop]: Abstraction has 235597 states and 375320 transitions. [2020-10-12 19:16:02,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:16:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 235597 states and 375320 transitions. [2020-10-12 19:16:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:16:02,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:16:02,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:16:02,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:16:02,648 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:16:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:16:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1809199673, now seen corresponding path program 1 times [2020-10-12 19:16:02,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:16:02,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987384093] [2020-10-12 19:16:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:16:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:16:02,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:02,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:02,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:02,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:02,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:03,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:06,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:07,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:16:07,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:16:07,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:16:07,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:16:07,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:16:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:16:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:16:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:16:07,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:16:07,884 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:16:07,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:16:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:16:07,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:16:07,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:16:07,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:16:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:16:07,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987384093] [2020-10-12 19:16:07,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:16:07,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:16:07,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20439352] [2020-10-12 19:16:07,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:16:07,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:16:07,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:16:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:16:07,915 INFO L87 Difference]: Start difference. First operand 235597 states and 375320 transitions. Second operand 5 states.