/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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:18:14,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:18:14,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:18:14,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:18:14,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:18:14,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:18:14,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:18:14,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:18:14,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:18:14,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:18:14,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:18:14,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:18:14,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:18:14,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:18:14,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:18:14,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:18:14,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:18:14,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:18:14,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:18:14,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:18:14,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:18:14,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:18:14,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:18:14,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:18:14,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:18:14,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:18:14,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:18:14,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:18:14,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:18:14,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:18:14,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:18:14,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:18:14,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:18:14,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:18:14,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:18:14,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:18:14,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:18:14,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:18:14,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:18:14,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:18:14,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:18:14,268 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 20:18:14,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:18:14,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:18:14,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:18:14,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:18:14,308 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:18:14,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:18:14,308 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:18:14,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:18:14,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:18:14,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:18:14,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:18:14,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:18:14,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:18:14,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:18:14,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:18:14,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:18:14,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:18:14,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:18:14,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:18:14,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:18:14,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:18:14,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:18:14,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:18:14,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:18:14,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:18:14,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:18:14,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:18:14,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:18:14,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:18:14,314 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 20:18:14,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:18:14,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:18:14,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:18:14,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:18:14,613 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:18:14,614 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:18:14,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80438c59e/f78a6b649eeb45658c3a01919e1dec80/FLAG7d2ccf785 [2020-10-12 20:18:15,202 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:18:15,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:18:15,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80438c59e/f78a6b649eeb45658c3a01919e1dec80/FLAG7d2ccf785 [2020-10-12 20:18:15,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80438c59e/f78a6b649eeb45658c3a01919e1dec80 [2020-10-12 20:18:15,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:18:15,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:18:15,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:18:15,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:18:15,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:18:15,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:18:15" (1/1) ... [2020-10-12 20:18:15,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121db1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:15, skipping insertion in model container [2020-10-12 20:18:15,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:18:15" (1/1) ... [2020-10-12 20:18:15,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:18:15,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:18:15,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:18:15,918 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:18:16,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:18:16,112 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:18:16,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16 WrapperNode [2020-10-12 20:18:16,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:18:16,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:18:16,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:18:16,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:18:16,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (1/1) ... [2020-10-12 20:18:16,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:18:16,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:18:16,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:18:16,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:18:16,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (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 20:18:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:18:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:18:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:18:16,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:18:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:18:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:18:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:18:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:18:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:18:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:18:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:18:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:18:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:18:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:18:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:18:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:18:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:18:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:18:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:18:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:18:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:18:17,023 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:18:17,024 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:18:17,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:18:17 BoogieIcfgContainer [2020-10-12 20:18:17,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:18:17,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:18:17,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:18:17,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:18:17,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:18:15" (1/3) ... [2020-10-12 20:18:17,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9de09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:18:17, skipping insertion in model container [2020-10-12 20:18:17,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:18:16" (2/3) ... [2020-10-12 20:18:17,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9de09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:18:17, skipping insertion in model container [2020-10-12 20:18:17,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:18:17" (3/3) ... [2020-10-12 20:18:17,039 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:18:17,051 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:18:17,059 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:18:17,073 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:18:17,101 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:18:17,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:18:17,102 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:18:17,102 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:18:17,102 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:18:17,103 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:18:17,103 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:18:17,103 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:18:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states. [2020-10-12 20:18:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:18:17,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:17,141 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 20:18:17,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1725986399, now seen corresponding path program 1 times [2020-10-12 20:18:17,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:17,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211153007] [2020-10-12 20:18:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:17,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:18,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:19,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:19,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:18:19,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:18:19,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2300 [2020-10-12 20:18:19,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:18:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:18:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:18:20,306 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:20,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:20,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:20,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:20,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:20,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:20,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 20:18:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:18:20,397 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 20:18:20,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211153007] [2020-10-12 20:18:20,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:20,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:18:20,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516716823] [2020-10-12 20:18:20,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:18:20,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:18:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:20,440 INFO L87 Difference]: Start difference. First operand 160 states. Second operand 6 states. [2020-10-12 20:18:20,847 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 20:18:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:21,875 INFO L93 Difference]: Finished difference Result 746 states and 1238 transitions. [2020-10-12 20:18:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:18:21,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:18:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:21,898 INFO L225 Difference]: With dead ends: 746 [2020-10-12 20:18:21,898 INFO L226 Difference]: Without dead ends: 631 [2020-10-12 20:18:21,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:18:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-12 20:18:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 249. [2020-10-12 20:18:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 20:18:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 392 transitions. [2020-10-12 20:18:21,980 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 392 transitions. Word has length 66 [2020-10-12 20:18:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:21,981 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 392 transitions. [2020-10-12 20:18:21,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:18:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 392 transitions. [2020-10-12 20:18:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:18:21,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:21,985 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 20:18:21,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:18:21,985 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1904360380, now seen corresponding path program 1 times [2020-10-12 20:18:21,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:21,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372310812] [2020-10-12 20:18:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:22,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:24,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:24,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:18:24,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:18:24,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2485 [2020-10-12 20:18:24,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:24,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:18:24,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:18:24,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:18:24,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:18:24,863 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:24,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:24,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:24,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:24,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:24,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:24,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:18:24,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:24,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:18:24,910 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 20:18:24,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372310812] [2020-10-12 20:18:24,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:24,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:18:24,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495264183] [2020-10-12 20:18:24,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:18:24,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:18:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:24,915 INFO L87 Difference]: Start difference. First operand 249 states and 392 transitions. Second operand 7 states. [2020-10-12 20:18:25,206 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:18:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:26,397 INFO L93 Difference]: Finished difference Result 1585 states and 2595 transitions. [2020-10-12 20:18:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:18:26,397 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:18:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:26,406 INFO L225 Difference]: With dead ends: 1585 [2020-10-12 20:18:26,406 INFO L226 Difference]: Without dead ends: 1397 [2020-10-12 20:18:26,409 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 20:18:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-10-12 20:18:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 742. [2020-10-12 20:18:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-10-12 20:18:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1205 transitions. [2020-10-12 20:18:26,475 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1205 transitions. Word has length 67 [2020-10-12 20:18:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:26,476 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 1205 transitions. [2020-10-12 20:18:26,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:18:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1205 transitions. [2020-10-12 20:18:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:18:26,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:26,479 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 20:18:26,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:18:26,479 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:26,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1151422778, now seen corresponding path program 1 times [2020-10-12 20:18:26,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:26,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422602922] [2020-10-12 20:18:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:26,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:28,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:28,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:18:28,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:18:28,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2103 [2020-10-12 20:18:28,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:28,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:18:28,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:28,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:18:28,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:28,824 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:28,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:28,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:28,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:28,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:28,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:18:28,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:28,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:28,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:28,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:28,861 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 20:18:28,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422602922] [2020-10-12 20:18:28,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:28,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:18:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314122256] [2020-10-12 20:18:28,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:18:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:18:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:28,866 INFO L87 Difference]: Start difference. First operand 742 states and 1205 transitions. Second operand 7 states. [2020-10-12 20:18:29,107 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:18:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:30,367 INFO L93 Difference]: Finished difference Result 4590 states and 7534 transitions. [2020-10-12 20:18:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:18:30,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:18:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:30,389 INFO L225 Difference]: With dead ends: 4590 [2020-10-12 20:18:30,389 INFO L226 Difference]: Without dead ends: 3971 [2020-10-12 20:18:30,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:18:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2020-10-12 20:18:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2148. [2020-10-12 20:18:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2148 states. [2020-10-12 20:18:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 3510 transitions. [2020-10-12 20:18:30,554 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 3510 transitions. Word has length 68 [2020-10-12 20:18:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:30,555 INFO L479 AbstractCegarLoop]: Abstraction has 2148 states and 3510 transitions. [2020-10-12 20:18:30,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:18:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 3510 transitions. [2020-10-12 20:18:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:18:30,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:30,558 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 20:18:30,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:18:30,558 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1386862141, now seen corresponding path program 1 times [2020-10-12 20:18:30,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:30,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861203924] [2020-10-12 20:18:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:30,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:32,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:32,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:18:32,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:18:32,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1999 [2020-10-12 20:18:32,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:32,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:18:32,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:32,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:18:32,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:32,798 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:32,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:32,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:32,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:32,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:32,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:32,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:18:32,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:32,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:32,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:32,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:32,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:32,825 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 20:18:32,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861203924] [2020-10-12 20:18:32,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:32,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:18:32,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845173500] [2020-10-12 20:18:32,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:18:32,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:18:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:32,828 INFO L87 Difference]: Start difference. First operand 2148 states and 3510 transitions. Second operand 7 states. [2020-10-12 20:18:33,047 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:18:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:34,935 INFO L93 Difference]: Finished difference Result 13085 states and 21433 transitions. [2020-10-12 20:18:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:18:34,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:18:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:34,993 INFO L225 Difference]: With dead ends: 13085 [2020-10-12 20:18:34,993 INFO L226 Difference]: Without dead ends: 11110 [2020-10-12 20:18:35,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:18:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11110 states. [2020-10-12 20:18:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11110 to 6019. [2020-10-12 20:18:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6019 states. [2020-10-12 20:18:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 9830 transitions. [2020-10-12 20:18:35,525 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 9830 transitions. Word has length 69 [2020-10-12 20:18:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:35,526 INFO L479 AbstractCegarLoop]: Abstraction has 6019 states and 9830 transitions. [2020-10-12 20:18:35,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:18:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 9830 transitions. [2020-10-12 20:18:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:18:35,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:35,528 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, 1] [2020-10-12 20:18:35,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:18:35,528 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1470676787, now seen corresponding path program 1 times [2020-10-12 20:18:35,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:35,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142085541] [2020-10-12 20:18:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:35,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:35,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:36,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:18:36,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:18:36,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 990 [2020-10-12 20:18:36,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:36,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:18:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:18:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:36,908 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:36,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:36,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:36,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:36,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:36,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:36,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 20:18:36,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:36,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:36,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:36,964 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 20:18:36,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142085541] [2020-10-12 20:18:36,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:36,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:18:36,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895030404] [2020-10-12 20:18:36,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:18:36,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:18:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:36,967 INFO L87 Difference]: Start difference. First operand 6019 states and 9830 transitions. Second operand 6 states. [2020-10-12 20:18:37,220 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:18:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:38,743 INFO L93 Difference]: Finished difference Result 22181 states and 36265 transitions. [2020-10-12 20:18:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:18:38,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:18:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:38,814 INFO L225 Difference]: With dead ends: 22181 [2020-10-12 20:18:38,814 INFO L226 Difference]: Without dead ends: 16336 [2020-10-12 20:18:38,827 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 20:18:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16336 states. [2020-10-12 20:18:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16336 to 6019. [2020-10-12 20:18:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6019 states. [2020-10-12 20:18:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 9822 transitions. [2020-10-12 20:18:39,285 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 9822 transitions. Word has length 71 [2020-10-12 20:18:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:39,286 INFO L479 AbstractCegarLoop]: Abstraction has 6019 states and 9822 transitions. [2020-10-12 20:18:39,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:18:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 9822 transitions. [2020-10-12 20:18:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:18:39,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:39,288 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, 1, 1] [2020-10-12 20:18:39,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:18:39,288 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash 7098157, now seen corresponding path program 1 times [2020-10-12 20:18:39,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:39,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447677676] [2020-10-12 20:18:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:39,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:39,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:39,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:43,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:43,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:44,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:44,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:18:44,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 20:18:44,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:18:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:18:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:18:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:18:44,635 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:44,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:44,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:44,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:44,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:44,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:44,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:18:44,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:44,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:44,665 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 20:18:44,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447677676] [2020-10-12 20:18:44,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:44,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:18:44,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250304585] [2020-10-12 20:18:44,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:18:44,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:18:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:44,667 INFO L87 Difference]: Start difference. First operand 6019 states and 9822 transitions. Second operand 6 states. [2020-10-12 20:18:44,877 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:18:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:46,648 INFO L93 Difference]: Finished difference Result 23691 states and 38698 transitions. [2020-10-12 20:18:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:18:46,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 20:18:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:46,690 INFO L225 Difference]: With dead ends: 23691 [2020-10-12 20:18:46,690 INFO L226 Difference]: Without dead ends: 17846 [2020-10-12 20:18:46,704 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 20:18:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17846 states. [2020-10-12 20:18:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17846 to 11581. [2020-10-12 20:18:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11581 states. [2020-10-12 20:18:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11581 states to 11581 states and 18868 transitions. [2020-10-12 20:18:47,309 INFO L78 Accepts]: Start accepts. Automaton has 11581 states and 18868 transitions. Word has length 72 [2020-10-12 20:18:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:47,309 INFO L479 AbstractCegarLoop]: Abstraction has 11581 states and 18868 transitions. [2020-10-12 20:18:47,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:18:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 11581 states and 18868 transitions. [2020-10-12 20:18:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:18:47,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:47,311 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, 1, 1] [2020-10-12 20:18:47,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:18:47,311 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:47,312 INFO L82 PathProgramCache]: Analyzing trace with hash -298977637, now seen corresponding path program 1 times [2020-10-12 20:18:47,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:47,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123929045] [2020-10-12 20:18:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:47,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:47,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:47,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:47,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:47,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:51,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:52,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:18:52,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:18:52,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:52,611 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:52,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:52,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:52,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:52,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:18:52,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:52,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:18:52,667 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 20:18:52,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123929045] [2020-10-12 20:18:52,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:52,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:18:52,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965861846] [2020-10-12 20:18:52,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:18:52,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:52,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:18:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:52,671 INFO L87 Difference]: Start difference. First operand 11581 states and 18868 transitions. Second operand 6 states. [2020-10-12 20:18:53,080 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:18:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:54,731 INFO L93 Difference]: Finished difference Result 31409 states and 51161 transitions. [2020-10-12 20:18:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:18:54,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 20:18:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:54,808 INFO L225 Difference]: With dead ends: 31409 [2020-10-12 20:18:54,808 INFO L226 Difference]: Without dead ends: 24766 [2020-10-12 20:18:54,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:18:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24766 states. [2020-10-12 20:18:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24766 to 18505. [2020-10-12 20:18:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18505 states. [2020-10-12 20:18:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18505 states to 18505 states and 30140 transitions. [2020-10-12 20:18:55,789 INFO L78 Accepts]: Start accepts. Automaton has 18505 states and 30140 transitions. Word has length 72 [2020-10-12 20:18:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:55,789 INFO L479 AbstractCegarLoop]: Abstraction has 18505 states and 30140 transitions. [2020-10-12 20:18:55,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:18:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18505 states and 30140 transitions. [2020-10-12 20:18:55,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:18:55,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:55,791 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, 1, 1] [2020-10-12 20:18:55,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:18:55,791 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:55,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:55,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1399973400, now seen corresponding path program 1 times [2020-10-12 20:18:55,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:55,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925503227] [2020-10-12 20:18:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:55,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:56,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:56,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:56,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:18:56,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:18:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 545 [2020-10-12 20:18:56,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:18:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:18:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:18:56,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:57,184 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:18:57,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:57,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:57,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:57,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:57,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:18:57,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:57,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:57,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:57,216 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 20:18:57,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925503227] [2020-10-12 20:18:57,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:57,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:18:57,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177169728] [2020-10-12 20:18:57,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:18:57,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:18:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:18:57,224 INFO L87 Difference]: Start difference. First operand 18505 states and 30140 transitions. Second operand 4 states. [2020-10-12 20:18:57,426 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-12 20:18:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:59,751 INFO L93 Difference]: Finished difference Result 50572 states and 82086 transitions. [2020-10-12 20:18:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:18:59,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-12 20:18:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:59,832 INFO L225 Difference]: With dead ends: 50572 [2020-10-12 20:18:59,832 INFO L226 Difference]: Without dead ends: 32144 [2020-10-12 20:18:59,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:18:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32144 states. [2020-10-12 20:19:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32144 to 31934. [2020-10-12 20:19:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31934 states. [2020-10-12 20:19:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31934 states to 31934 states and 51273 transitions. [2020-10-12 20:19:01,951 INFO L78 Accepts]: Start accepts. Automaton has 31934 states and 51273 transitions. Word has length 72 [2020-10-12 20:19:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:01,951 INFO L479 AbstractCegarLoop]: Abstraction has 31934 states and 51273 transitions. [2020-10-12 20:19:01,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:19:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 31934 states and 51273 transitions. [2020-10-12 20:19:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:19:01,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:01,953 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, 1, 1, 1] [2020-10-12 20:19:01,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:19:01,953 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash 539882925, now seen corresponding path program 1 times [2020-10-12 20:19:01,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:01,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561600419] [2020-10-12 20:19:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:01,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:02,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:02,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:02,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:06,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:07,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5433 [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:19:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 20:19:07,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:07,644 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:19:07,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:07,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:07,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:07,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:07,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:19:07,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:07,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:07,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:07,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:07,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:07,678 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 20:19:07,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561600419] [2020-10-12 20:19:07,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:07,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:19:07,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688287988] [2020-10-12 20:19:07,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:19:07,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:07,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:19:07,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:19:07,680 INFO L87 Difference]: Start difference. First operand 31934 states and 51273 transitions. Second operand 5 states. [2020-10-12 20:19:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:11,566 INFO L93 Difference]: Finished difference Result 93385 states and 149869 transitions. [2020-10-12 20:19:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:19:11,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-12 20:19:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:11,679 INFO L225 Difference]: With dead ends: 93385 [2020-10-12 20:19:11,680 INFO L226 Difference]: Without dead ends: 61474 [2020-10-12 20:19:11,750 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 20:19:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61474 states. [2020-10-12 20:19:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61474 to 61472. [2020-10-12 20:19:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61472 states. [2020-10-12 20:19:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61472 states to 61472 states and 97987 transitions. [2020-10-12 20:19:15,620 INFO L78 Accepts]: Start accepts. Automaton has 61472 states and 97987 transitions. Word has length 73 [2020-10-12 20:19:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:15,620 INFO L479 AbstractCegarLoop]: Abstraction has 61472 states and 97987 transitions. [2020-10-12 20:19:15,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:19:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 61472 states and 97987 transitions. [2020-10-12 20:19:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:19:15,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:15,622 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, 1, 1, 1, 1] [2020-10-12 20:19:15,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:19:15,622 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2129302975, now seen corresponding path program 1 times [2020-10-12 20:19:15,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:15,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107966263] [2020-10-12 20:19:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:15,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:15,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:15,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:20,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 20:19:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:20,855 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:19:20,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:20,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:20,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:20,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:20,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:19:20,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:20,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:20,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:20,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:20,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:20,883 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 20:19:20,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107966263] [2020-10-12 20:19:20,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:20,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:19:20,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659246918] [2020-10-12 20:19:20,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:19:20,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:20,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:19:20,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:19:20,886 INFO L87 Difference]: Start difference. First operand 61472 states and 97987 transitions. Second operand 5 states. [2020-10-12 20:19:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:24,500 INFO L93 Difference]: Finished difference Result 122910 states and 195921 transitions. [2020-10-12 20:19:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:19:24,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-12 20:19:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:24,615 INFO L225 Difference]: With dead ends: 122910 [2020-10-12 20:19:24,616 INFO L226 Difference]: Without dead ends: 61472 [2020-10-12 20:19:24,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:19:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61472 states. [2020-10-12 20:19:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61472 to 61472. [2020-10-12 20:19:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61472 states. [2020-10-12 20:19:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61472 states to 61472 states and 97985 transitions. [2020-10-12 20:19:28,429 INFO L78 Accepts]: Start accepts. Automaton has 61472 states and 97985 transitions. Word has length 74 [2020-10-12 20:19:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:28,429 INFO L479 AbstractCegarLoop]: Abstraction has 61472 states and 97985 transitions. [2020-10-12 20:19:28,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:19:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61472 states and 97985 transitions. [2020-10-12 20:19:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:19:28,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:28,432 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, 1, 1, 1, 1] [2020-10-12 20:19:28,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:19:28,432 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1941823898, now seen corresponding path program 1 times [2020-10-12 20:19:28,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:28,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383908986] [2020-10-12 20:19:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:34,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:34,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5800 [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:19:34,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:34,445 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:19:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:34,466 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 20:19:34,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383908986] [2020-10-12 20:19:34,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:34,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:19:34,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997596252] [2020-10-12 20:19:34,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:19:34,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:19:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:19:34,468 INFO L87 Difference]: Start difference. First operand 61472 states and 97985 transitions. Second operand 5 states. [2020-10-12 20:19:34,681 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:19:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:38,977 INFO L93 Difference]: Finished difference Result 132546 states and 211360 transitions. [2020-10-12 20:19:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:19:38,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-12 20:19:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:39,084 INFO L225 Difference]: With dead ends: 132546 [2020-10-12 20:19:39,084 INFO L226 Difference]: Without dead ends: 74158 [2020-10-12 20:19:39,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:19:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74158 states. [2020-10-12 20:19:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74158 to 71077. [2020-10-12 20:19:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71077 states. [2020-10-12 20:19:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71077 states to 71077 states and 113352 transitions. [2020-10-12 20:19:43,267 INFO L78 Accepts]: Start accepts. Automaton has 71077 states and 113352 transitions. Word has length 74 [2020-10-12 20:19:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:19:43,267 INFO L479 AbstractCegarLoop]: Abstraction has 71077 states and 113352 transitions. [2020-10-12 20:19:43,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:19:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 71077 states and 113352 transitions. [2020-10-12 20:19:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:19:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:19:43,270 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, 1, 1, 1, 1] [2020-10-12 20:19:43,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:19:43,271 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:19:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:19:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -908075202, now seen corresponding path program 1 times [2020-10-12 20:19:43,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:19:43,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794708557] [2020-10-12 20:19:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:19:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:43,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:49,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6099 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:19:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:49,594 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:19:49,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:19:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:19:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:19:49,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:19:49,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:19:49,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:19:49,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:19:49,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:19:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:19:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:19:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:19:49,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:19:49,618 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 20:19:49,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794708557] [2020-10-12 20:19:49,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:19:49,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:19:49,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874308988] [2020-10-12 20:19:49,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:19:49,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:19:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:19:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:19:49,621 INFO L87 Difference]: Start difference. First operand 71077 states and 113352 transitions. Second operand 6 states. [2020-10-12 20:19:49,842 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:19:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:19:55,370 INFO L93 Difference]: Finished difference Result 122910 states and 196084 transitions. [2020-10-12 20:19:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:19:55,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 20:19:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:19:55,493 INFO L225 Difference]: With dead ends: 122910 [2020-10-12 20:19:55,494 INFO L226 Difference]: Without dead ends: 84536 [2020-10-12 20:19:55,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:19:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84536 states. [2020-10-12 20:20:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84536 to 83155. [2020-10-12 20:20:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83155 states. [2020-10-12 20:20:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83155 states to 83155 states and 132628 transitions. [2020-10-12 20:20:00,456 INFO L78 Accepts]: Start accepts. Automaton has 83155 states and 132628 transitions. Word has length 74 [2020-10-12 20:20:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:00,456 INFO L479 AbstractCegarLoop]: Abstraction has 83155 states and 132628 transitions. [2020-10-12 20:20:00,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:20:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 83155 states and 132628 transitions. [2020-10-12 20:20:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:20:00,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:00,458 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, 1, 1, 1, 1, 1] [2020-10-12 20:20:00,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:20:00,459 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1976877507, now seen corresponding path program 1 times [2020-10-12 20:20:00,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:00,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140846758] [2020-10-12 20:20:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:00,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:00,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:00,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:01,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:20:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 20:20:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:20:05,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:05,698 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:20:05,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:05,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:05,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:05,717 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 20:20:05,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140846758] [2020-10-12 20:20:05,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:05,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:20:05,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045725868] [2020-10-12 20:20:05,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:20:05,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:05,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:20:05,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:20:05,719 INFO L87 Difference]: Start difference. First operand 83155 states and 132628 transitions. Second operand 7 states. [2020-10-12 20:20:05,939 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:20:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:14,379 INFO L93 Difference]: Finished difference Result 176275 states and 281371 transitions. [2020-10-12 20:20:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:20:14,380 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-12 20:20:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:14,820 INFO L225 Difference]: With dead ends: 176275 [2020-10-12 20:20:14,821 INFO L226 Difference]: Without dead ends: 138525 [2020-10-12 20:20:14,865 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 20:20:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138525 states. [2020-10-12 20:20:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138525 to 101534. [2020-10-12 20:20:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101534 states. [2020-10-12 20:20:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101534 states to 101534 states and 161985 transitions. [2020-10-12 20:20:23,664 INFO L78 Accepts]: Start accepts. Automaton has 101534 states and 161985 transitions. Word has length 75 [2020-10-12 20:20:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:23,664 INFO L479 AbstractCegarLoop]: Abstraction has 101534 states and 161985 transitions. [2020-10-12 20:20:23,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:20:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 101534 states and 161985 transitions. [2020-10-12 20:20:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 20:20:23,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:23,668 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:20:23,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:20:23,668 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1206154964, now seen corresponding path program 1 times [2020-10-12 20:20:23,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:23,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932797589] [2020-10-12 20:20:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:23,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:23,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:23,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:24,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:24,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:28,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 20:20:28,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:28,906 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:20:28,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:28,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:28,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:28,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:28,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:20:28,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:28,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:28,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:28,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:28,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:28,927 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 20:20:28,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932797589] [2020-10-12 20:20:28,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:28,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:20:28,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566245288] [2020-10-12 20:20:28,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:20:28,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:20:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:20:28,929 INFO L87 Difference]: Start difference. First operand 101534 states and 161985 transitions. Second operand 7 states. [2020-10-12 20:20:29,150 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:20:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:20:40,544 INFO L93 Difference]: Finished difference Result 220598 states and 352210 transitions. [2020-10-12 20:20:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:20:40,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-10-12 20:20:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:20:40,786 INFO L225 Difference]: With dead ends: 220598 [2020-10-12 20:20:40,786 INFO L226 Difference]: Without dead ends: 168753 [2020-10-12 20:20:40,838 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 20:20:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168753 states. [2020-10-12 20:20:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168753 to 120988. [2020-10-12 20:20:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120988 states. [2020-10-12 20:20:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120988 states to 120988 states and 193047 transitions. [2020-10-12 20:20:49,807 INFO L78 Accepts]: Start accepts. Automaton has 120988 states and 193047 transitions. Word has length 76 [2020-10-12 20:20:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:20:49,808 INFO L479 AbstractCegarLoop]: Abstraction has 120988 states and 193047 transitions. [2020-10-12 20:20:49,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:20:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 120988 states and 193047 transitions. [2020-10-12 20:20:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 20:20:49,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:20:49,811 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:20:49,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:20:49,812 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:20:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:20:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1969908893, now seen corresponding path program 1 times [2020-10-12 20:20:49,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:20:49,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919661883] [2020-10-12 20:20:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:20:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:49,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:49,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:50,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:50,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:54,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:54,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 20:20:54,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:20:54,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:20:54,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:20:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 20:20:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 20:20:54,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:55,046 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:20:55,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:20:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:20:55,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:20:55,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:20:55,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:20:55,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:20:55,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:20:55,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:20:55,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:20:55,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:20:55,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:20:55,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:20:55,065 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 20:20:55,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919661883] [2020-10-12 20:20:55,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:20:55,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:20:55,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449504633] [2020-10-12 20:20:55,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:20:55,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:20:55,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:20:55,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:20:55,068 INFO L87 Difference]: Start difference. First operand 120988 states and 193047 transitions. Second operand 5 states. [2020-10-12 20:21:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:21:10,575 INFO L93 Difference]: Finished difference Result 346880 states and 551449 transitions. [2020-10-12 20:21:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:21:10,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-12 20:21:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:21:10,946 INFO L225 Difference]: With dead ends: 346880 [2020-10-12 20:21:10,946 INFO L226 Difference]: Without dead ends: 226359 [2020-10-12 20:21:11,045 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 20:21:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226359 states. [2020-10-12 20:21:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226359 to 221873. [2020-10-12 20:21:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221873 states. [2020-10-12 20:21:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221873 states to 221873 states and 348912 transitions. [2020-10-12 20:21:30,197 INFO L78 Accepts]: Start accepts. Automaton has 221873 states and 348912 transitions. Word has length 76 [2020-10-12 20:21:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:21:30,197 INFO L479 AbstractCegarLoop]: Abstraction has 221873 states and 348912 transitions. [2020-10-12 20:21:30,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:21:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 221873 states and 348912 transitions. [2020-10-12 20:21:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 20:21:30,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:21:30,201 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:21:30,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:21:30,201 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:21:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:21:30,201 INFO L82 PathProgramCache]: Analyzing trace with hash -627830829, now seen corresponding path program 1 times [2020-10-12 20:21:30,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:21:30,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412044247] [2020-10-12 20:21:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:21:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:21:30,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:30,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:30,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:30,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:30,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:35,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:21:35,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 20:21:35,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:21:35,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 20:21:35,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:21:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:21:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:21:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 20:21:35,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:21:35,447 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:21:35,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:21:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:21:35,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:21:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:21:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:21:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:21:35,466 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 20:21:35,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412044247] [2020-10-12 20:21:35,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:21:35,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:21:35,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030093851] [2020-10-12 20:21:35,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:21:35,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:21:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:21:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:21:35,468 INFO L87 Difference]: Start difference. First operand 221873 states and 348912 transitions. Second operand 7 states. [2020-10-12 20:21:35,692 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:21:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:21:59,776 INFO L93 Difference]: Finished difference Result 409438 states and 644108 transitions. [2020-10-12 20:21:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:21:59,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-10-12 20:21:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:22:00,252 INFO L225 Difference]: With dead ends: 409438 [2020-10-12 20:22:00,252 INFO L226 Difference]: Without dead ends: 296491 [2020-10-12 20:22:00,371 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