/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/array-examples/standard_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:58:53,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:58:53,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:58:53,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:58:53,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:58:53,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:58:53,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:58:53,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:58:53,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:58:53,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:58:53,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:58:53,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:58:53,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:58:53,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:58:53,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:58:53,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:58:53,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:58:53,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:58:53,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:58:53,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:58:53,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:58:53,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:58:53,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:58:53,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:58:53,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:58:53,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:58:53,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:58:53,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:58:53,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:58:53,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:58:53,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:58:53,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:58:53,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:58:53,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:58:53,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:58:53,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:58:53,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:58:53,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:58:53,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:58:53,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:58:53,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:58:53,256 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 09:58:53,300 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:58:53,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:58:53,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:58:53,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:58:53,303 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:58:53,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:58:53,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:58:53,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:58:53,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:58:53,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:58:53,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:58:53,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:58:53,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:58:53,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:58:53,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:58:53,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:58:53,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:58:53,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:58:53,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:58:53,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:58:53,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:58:53,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:58:53,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:58:53,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:58:53,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:58:53,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:58:53,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:58:53,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:58:53,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:58:53,309 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 09:58:53,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:58:53,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:58:53,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:58:53,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:58:53,632 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:58:53,633 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-12 09:58:53,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/630c92de7/5da492fb792246ef9767bb840210377f/FLAG2513bca38 [2020-10-12 09:58:54,189 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:58:54,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-12 09:58:54,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/630c92de7/5da492fb792246ef9767bb840210377f/FLAG2513bca38 [2020-10-12 09:58:54,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/630c92de7/5da492fb792246ef9767bb840210377f [2020-10-12 09:58:54,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:58:54,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:58:54,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:58:54,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:58:54,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:58:54,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54, skipping insertion in model container [2020-10-12 09:58:54,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:58:54,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:58:54,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:58:54,807 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:58:54,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:58:54,855 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:58:54,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54 WrapperNode [2020-10-12 09:58:54,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:58:54,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:58:54,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:58:54,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:58:54,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (1/1) ... [2020-10-12 09:58:54,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:58:54,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:58:54,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:58:54,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:58:54,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (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 09:58:55,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:58:55,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:58:55,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:58:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:58:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:58:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:58:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:58:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:58:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:58:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:58:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:58:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:58:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:58:55,317 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:58:55,318 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 09:58:55,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:58:55 BoogieIcfgContainer [2020-10-12 09:58:55,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:58:55,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:58:55,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:58:55,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:58:55,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:58:54" (1/3) ... [2020-10-12 09:58:55,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475c05d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:58:55, skipping insertion in model container [2020-10-12 09:58:55,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:54" (2/3) ... [2020-10-12 09:58:55,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475c05d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:58:55, skipping insertion in model container [2020-10-12 09:58:55,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:58:55" (3/3) ... [2020-10-12 09:58:55,332 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2020-10-12 09:58:55,344 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:58:55,354 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:58:55,370 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:58:55,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:58:55,400 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:58:55,400 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:58:55,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:58:55,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:58:55,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:58:55,401 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:58:55,401 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:58:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-12 09:58:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 09:58:55,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:55,432 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] [2020-10-12 09:58:55,433 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2020-10-12 09:58:55,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:55,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540255918] [2020-10-12 09:58:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:55,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:55,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:55,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 09:58:56,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:58:56,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-12 09:58:56,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:58:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:58:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:58:56,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:58:56,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:56,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:56,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:56,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:56,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:58:56,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:56,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:56,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:56,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:56,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:58:56,568 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 09:58:56,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540255918] [2020-10-12 09:58:56,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:58:56,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:58:56,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62401044] [2020-10-12 09:58:56,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:58:56,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:58:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:58:56,606 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-12 09:58:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:56,836 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2020-10-12 09:58:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:58:56,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-12 09:58:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:56,870 INFO L225 Difference]: With dead ends: 60 [2020-10-12 09:58:56,871 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 09:58:56,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:58:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 09:58:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 09:58:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 09:58:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-12 09:58:56,943 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-12 09:58:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:56,944 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-12 09:58:56,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:58:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-12 09:58:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:58:56,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:56,946 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] [2020-10-12 09:58:56,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:58:56,947 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2020-10-12 09:58:56,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:56,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718111046] [2020-10-12 09:58:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:56,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:57,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:01,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:01,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 09:59:01,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:01,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:01,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:01,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:59:01,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:59:01,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:02,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:02,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:02,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:02,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:02,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:02,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:02,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:02,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718111046] [2020-10-12 09:59:02,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:02,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:59:02,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630403059] [2020-10-12 09:59:02,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:59:02,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:02,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:59:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:02,187 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 10 states. [2020-10-12 09:59:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:02,624 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-12 09:59:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:59:02,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 09:59:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:02,635 INFO L225 Difference]: With dead ends: 56 [2020-10-12 09:59:02,635 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:59:02,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:59:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:59:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-12 09:59:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:59:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-12 09:59:02,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2020-10-12 09:59:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:02,678 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-12 09:59:02,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:59:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-12 09:59:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:59:02,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:02,680 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:02,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:59:02,681 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -783240192, now seen corresponding path program 2 times [2020-10-12 09:59:02,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:02,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063297171] [2020-10-12 09:59:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:02,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:07,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:07,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:59:07,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:07,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:07,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:59:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:59:07,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:07,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:07,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:07,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:07,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:07,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:07,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:07,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:07,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:07,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:07,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063297171] [2020-10-12 09:59:07,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:07,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:59:07,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752591040] [2020-10-12 09:59:07,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:59:07,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:07,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:59:07,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:07,912 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-12 09:59:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:08,282 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-12 09:59:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:59:08,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-12 09:59:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:08,287 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:59:08,287 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 09:59:08,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:59:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 09:59:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-12 09:59:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:59:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-12 09:59:08,298 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-12 09:59:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:08,298 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-12 09:59:08,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:59:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-12 09:59:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:59:08,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:08,300 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 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 09:59:08,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:08,300 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -601720812, now seen corresponding path program 3 times [2020-10-12 09:59:08,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:08,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066639583] [2020-10-12 09:59:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:08,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:13,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:59:13,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:59:13,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:59:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:59:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:59:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:13,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:13,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:13,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:13,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:13,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:13,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:13,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066639583] [2020-10-12 09:59:13,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:13,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:59:13,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072705306] [2020-10-12 09:59:13,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:59:13,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:13,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:59:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:13,525 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 12 states. [2020-10-12 09:59:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:13,904 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2020-10-12 09:59:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:59:13,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 09:59:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:13,907 INFO L225 Difference]: With dead ends: 71 [2020-10-12 09:59:13,907 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 09:59:13,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:59:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 09:59:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 41. [2020-10-12 09:59:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:59:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-12 09:59:13,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2020-10-12 09:59:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:13,917 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-12 09:59:13,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:59:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-12 09:59:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:59:13,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:13,918 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 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 09:59:13,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:13,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash 730412672, now seen corresponding path program 4 times [2020-10-12 09:59:13,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:13,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255339717] [2020-10-12 09:59:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:13,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:18,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:59:18,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:59:18,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:59:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:18,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:59:18,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:19,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:19,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:19,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:19,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:19,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:19,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:19,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:19,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:19,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:19,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:19,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255339717] [2020-10-12 09:59:19,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:19,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:59:19,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010752976] [2020-10-12 09:59:19,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:59:19,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:59:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:19,180 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 13 states. [2020-10-12 09:59:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:19,554 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2020-10-12 09:59:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:59:19,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 09:59:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:19,557 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:59:19,557 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 09:59:19,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:59:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 09:59:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 42. [2020-10-12 09:59:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 09:59:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-12 09:59:19,571 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 29 [2020-10-12 09:59:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:19,572 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-12 09:59:19,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:59:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-12 09:59:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:59:19,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:19,573 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 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 09:59:19,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:19,574 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash -923122284, now seen corresponding path program 5 times [2020-10-12 09:59:19,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:19,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140584278] [2020-10-12 09:59:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:19,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:24,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:59:24,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:24,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:59:24,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:59:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:59:24,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:24,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:24,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:24,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:24,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:24,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:24,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:24,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:24,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140584278] [2020-10-12 09:59:24,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:24,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:59:24,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873512613] [2020-10-12 09:59:24,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:59:24,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:59:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:59:24,826 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 14 states. [2020-10-12 09:59:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:25,160 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2020-10-12 09:59:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:59:25,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 09:59:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:25,162 INFO L225 Difference]: With dead ends: 79 [2020-10-12 09:59:25,163 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 09:59:25,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:59:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 09:59:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 43. [2020-10-12 09:59:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:59:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-12 09:59:25,181 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 30 [2020-10-12 09:59:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:25,182 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-12 09:59:25,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:59:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-12 09:59:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:59:25,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:25,188 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 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 09:59:25,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:25,188 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash -643098368, now seen corresponding path program 6 times [2020-10-12 09:59:25,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:25,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063660689] [2020-10-12 09:59:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:25,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:29,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:59:29,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:29,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4692 [2020-10-12 09:59:29,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:59:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:59:29,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:30,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:30,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:30,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:30,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:30,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:30,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063660689] [2020-10-12 09:59:30,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:30,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:59:30,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588347850] [2020-10-12 09:59:30,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:59:30,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:30,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:59:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:59:30,163 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 15 states. [2020-10-12 09:59:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:30,582 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2020-10-12 09:59:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:59:30,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 09:59:30,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:30,584 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:59:30,584 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 09:59:30,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:59:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 09:59:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 44. [2020-10-12 09:59:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:59:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-12 09:59:30,593 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 31 [2020-10-12 09:59:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:30,593 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-12 09:59:30,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:59:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-12 09:59:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:59:30,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:30,594 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 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 09:59:30,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:30,595 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash -552291564, now seen corresponding path program 7 times [2020-10-12 09:59:30,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:30,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652421389] [2020-10-12 09:59:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:59:35,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:35,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4893 [2020-10-12 09:59:35,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:59:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:59:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:35,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:35,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:35,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:35,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:35,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652421389] [2020-10-12 09:59:35,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:35,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:59:35,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127333187] [2020-10-12 09:59:35,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:59:35,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:59:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:59:35,818 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 16 states. [2020-10-12 09:59:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:36,308 INFO L93 Difference]: Finished difference Result 87 states and 121 transitions. [2020-10-12 09:59:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:59:36,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-12 09:59:36,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:36,309 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:59:36,309 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 09:59:36,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:59:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 09:59:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 45. [2020-10-12 09:59:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:59:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-12 09:59:36,317 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 32 [2020-10-12 09:59:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:36,322 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-12 09:59:36,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:59:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-12 09:59:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:59:36,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:36,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:36,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:36,324 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1175041461, now seen corresponding path program 1 times [2020-10-12 09:59:36,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:36,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886090950] [2020-10-12 09:59:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:36,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:41,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:59:41,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:41,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4898 [2020-10-12 09:59:41,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:59:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:59:41,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:41,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:41,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:41,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:41,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 09:59:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:41,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:41,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:41,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:41,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:41,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:41,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:41,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:41,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:41,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886090950] [2020-10-12 09:59:41,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:41,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:59:41,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345256486] [2020-10-12 09:59:41,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:59:41,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:59:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:41,606 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 13 states. [2020-10-12 09:59:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:42,189 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2020-10-12 09:59:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:59:42,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 09:59:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:42,191 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:59:42,191 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 09:59:42,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:59:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 09:59:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 09:59:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:59:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-12 09:59:42,201 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 34 [2020-10-12 09:59:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:42,201 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-12 09:59:42,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:59:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-12 09:59:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:59:42,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:42,203 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 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 09:59:42,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:42,203 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:42,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2032247936, now seen corresponding path program 8 times [2020-10-12 09:59:42,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:42,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318185026] [2020-10-12 09:59:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:42,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:47,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:47,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:59:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:47,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:47,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:47,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:47,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:47,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:47,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:47,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:47,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:47,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318185026] [2020-10-12 09:59:47,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:47,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:59:47,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551972818] [2020-10-12 09:59:47,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:59:47,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:59:47,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:59:47,556 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 17 states. [2020-10-12 09:59:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:48,031 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2020-10-12 09:59:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:59:48,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-12 09:59:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:48,033 INFO L225 Difference]: With dead ends: 109 [2020-10-12 09:59:48,034 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:59:48,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:59:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:59:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 61. [2020-10-12 09:59:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:59:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-12 09:59:48,059 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 33 [2020-10-12 09:59:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:48,059 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-12 09:59:48,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:59:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-12 09:59:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:59:48,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:48,061 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 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 09:59:48,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:59:48,065 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash -666255212, now seen corresponding path program 9 times [2020-10-12 09:59:48,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:48,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502089336] [2020-10-12 09:59:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:59:53,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:53,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:59:53,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:59:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:53,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:59:53,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:53,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:53,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:53,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:53,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:53,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:53,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:59:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 09:59:53,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502089336] [2020-10-12 09:59:53,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:53,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:59:53,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569818920] [2020-10-12 09:59:53,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:59:53,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:53,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:59:53,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:59:53,461 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 18 states. [2020-10-12 09:59:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:53,943 INFO L93 Difference]: Finished difference Result 114 states and 159 transitions. [2020-10-12 09:59:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:59:53,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-12 09:59:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:53,946 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:59:53,946 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 09:59:53,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:59:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 09:59:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 63. [2020-10-12 09:59:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:59:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-12 09:59:53,958 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 34 [2020-10-12 09:59:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:53,958 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-12 09:59:53,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:59:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-12 09:59:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:59:53,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:53,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:53,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:59:53,960 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1075302282, now seen corresponding path program 2 times [2020-10-12 09:59:53,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:53,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513449424] [2020-10-12 09:59:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:53,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:58,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:58,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:59:58,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 09:59:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 09:59:58,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:59:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:58,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:59:58,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:59,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:59,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:59,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:59,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:59,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:59:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:59,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:59,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:59,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:59,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513449424] [2020-10-12 09:59:59,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:59,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:59:59,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657294792] [2020-10-12 09:59:59,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:59:59,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:59,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:59:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:59:59,284 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 14 states. [2020-10-12 09:59:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:59,995 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2020-10-12 09:59:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:59:59,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-12 09:59:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:59,997 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:59:59,998 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:59:59,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:59:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 10:00:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-12 10:00:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 10:00:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-12 10:00:00,010 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 35 [2020-10-12 10:00:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:00,011 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-12 10:00:00,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:00:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-12 10:00:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:00:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:00,012 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 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 10:00:00,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:00:00,012 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1270153728, now seen corresponding path program 10 times [2020-10-12 10:00:00,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:00,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858014451] [2020-10-12 10:00:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:05,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:00:05,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:00:05,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:05,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:00:05,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:00:05,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:05,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:05,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:05,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:05,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:05,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:05,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:05,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:05,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:00:05,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858014451] [2020-10-12 10:00:05,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:05,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:05,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110430717] [2020-10-12 10:00:05,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:05,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:05,467 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 19 states. [2020-10-12 10:00:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:05,970 INFO L93 Difference]: Finished difference Result 120 states and 169 transitions. [2020-10-12 10:00:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:05,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-12 10:00:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:05,972 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:00:05,972 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 10:00:05,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:00:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 10:00:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 66. [2020-10-12 10:00:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:00:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-12 10:00:05,985 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 35 [2020-10-12 10:00:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:05,985 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-12 10:00:05,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-12 10:00:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:00:05,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:05,986 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 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 10:00:05,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:05,987 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1483828756, now seen corresponding path program 11 times [2020-10-12 10:00:05,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:05,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427719012] [2020-10-12 10:00:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:05,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:09,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:00:10,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:11,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:11,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:11,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:11,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:11,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:11,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:11,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:11,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:11,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:11,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:11,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:00:11,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427719012] [2020-10-12 10:00:11,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:11,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:11,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545428379] [2020-10-12 10:00:11,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:11,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:11,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:11,519 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 20 states. [2020-10-12 10:00:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:12,130 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2020-10-12 10:00:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:12,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-12 10:00:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:12,133 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:00:12,133 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 10:00:12,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:00:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 10:00:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 68. [2020-10-12 10:00:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:00:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-10-12 10:00:12,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 36 [2020-10-12 10:00:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:12,146 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-10-12 10:00:12,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-10-12 10:00:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:00:12,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:12,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:12,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:12,148 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1621922217, now seen corresponding path program 3 times [2020-10-12 10:00:12,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:12,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930313380] [2020-10-12 10:00:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:17,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:00:17,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:00:17,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:00:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:00:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:17,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:17,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:17,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:17,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:17,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:17,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:17,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:17,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 10:00:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:17,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:17,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:17,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:17,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930313380] [2020-10-12 10:00:17,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:17,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:00:17,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353614519] [2020-10-12 10:00:17,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:00:17,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:00:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:17,675 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 16 states. [2020-10-12 10:00:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:18,430 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2020-10-12 10:00:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:00:18,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 10:00:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:18,432 INFO L225 Difference]: With dead ends: 102 [2020-10-12 10:00:18,432 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 10:00:18,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:00:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 10:00:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-12 10:00:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:00:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-10-12 10:00:18,444 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 37 [2020-10-12 10:00:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:18,445 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-10-12 10:00:18,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:00:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-10-12 10:00:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:00:18,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:18,446 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 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 10:00:18,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:18,446 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash 957939840, now seen corresponding path program 12 times [2020-10-12 10:00:18,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:18,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6805599] [2020-10-12 10:00:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:18,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:23,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:00:23,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:23,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:00:23,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:00:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:00:23,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:00:23,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:24,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:24,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:24,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:24,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:24,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:24,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:24,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:24,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:24,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:00:24,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6805599] [2020-10-12 10:00:24,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:24,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:00:24,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22658465] [2020-10-12 10:00:24,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:00:24,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:24,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:00:24,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:24,035 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 21 states. [2020-10-12 10:00:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:24,612 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2020-10-12 10:00:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:24,613 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-12 10:00:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:24,614 INFO L225 Difference]: With dead ends: 131 [2020-10-12 10:00:24,614 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 10:00:24,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:00:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 10:00:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 71. [2020-10-12 10:00:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 10:00:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-10-12 10:00:24,626 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 37 [2020-10-12 10:00:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:24,626 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-10-12 10:00:24,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:00:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-10-12 10:00:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:00:24,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:24,628 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 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 10:00:24,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:24,628 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1835252628, now seen corresponding path program 13 times [2020-10-12 10:00:24,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:24,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577581704] [2020-10-12 10:00:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:29,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:00:29,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:29,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:00:29,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:29,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:00:29,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:00:29,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:00:29,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:30,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:30,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:00:30,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577581704] [2020-10-12 10:00:30,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:30,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:30,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851340400] [2020-10-12 10:00:30,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:30,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:30,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:30,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:30,285 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 22 states. [2020-10-12 10:00:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:30,902 INFO L93 Difference]: Finished difference Result 136 states and 197 transitions. [2020-10-12 10:00:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:00:30,903 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-12 10:00:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:30,904 INFO L225 Difference]: With dead ends: 136 [2020-10-12 10:00:30,905 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 10:00:30,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:00:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 10:00:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2020-10-12 10:00:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:00:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-12 10:00:30,914 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 38 [2020-10-12 10:00:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:30,914 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-12 10:00:30,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-12 10:00:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:00:30,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:30,915 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:30,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:30,916 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1389642282, now seen corresponding path program 4 times [2020-10-12 10:00:30,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:30,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449727974] [2020-10-12 10:00:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:30,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:00:35,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:36,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:36,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:36,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:36,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:36,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:36,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:36,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:36,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:36,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:36,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:36,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:00:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:36,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:00:36,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:36,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:00:36,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:36,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:00:36,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:00:36,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:00:36,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:00:36,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449727974] [2020-10-12 10:00:36,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:36,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:00:36,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711148488] [2020-10-12 10:00:36,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:00:36,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:00:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:36,334 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 18 states. [2020-10-12 10:00:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:37,365 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2020-10-12 10:00:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:00:37,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-12 10:00:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:37,367 INFO L225 Difference]: With dead ends: 87 [2020-10-12 10:00:37,367 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:00:37,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:00:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:00:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-12 10:00:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 10:00:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-12 10:00:37,374 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 39 [2020-10-12 10:00:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:37,374 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-12 10:00:37,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:00:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-12 10:00:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:00:37,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:37,375 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 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 10:00:37,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:37,375 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1032822016, now seen corresponding path program 14 times [2020-10-12 10:00:37,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:37,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652399174] [2020-10-12 10:00:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:37,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:42,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:00:42,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:42,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:00:42,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:00:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:00:42,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:00:42,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:43,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:43,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:43,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:43,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:00:43,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652399174] [2020-10-12 10:00:43,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:43,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:43,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245708321] [2020-10-12 10:00:43,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:43,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:43,346 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 23 states. [2020-10-12 10:00:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:43,952 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2020-10-12 10:00:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:00:43,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-12 10:00:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:43,953 INFO L225 Difference]: With dead ends: 96 [2020-10-12 10:00:43,954 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 10:00:43,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:00:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 10:00:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 41. [2020-10-12 10:00:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:00:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-12 10:00:43,968 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2020-10-12 10:00:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:43,969 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-12 10:00:43,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-12 10:00:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:00:43,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:43,970 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 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 10:00:43,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:43,970 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash 251177236, now seen corresponding path program 15 times [2020-10-12 10:00:43,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:43,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903862993] [2020-10-12 10:00:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:48,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:00:48,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:00:48,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 10:00:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:00:48,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:49,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:49,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:49,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:49,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:49,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:49,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:49,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:00:49,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903862993] [2020-10-12 10:00:49,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:49,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:49,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762735071] [2020-10-12 10:00:49,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:49,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:49,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:49,168 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 19 states. [2020-10-12 10:00:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:49,539 INFO L93 Difference]: Finished difference Result 135 states and 203 transitions. [2020-10-12 10:00:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:00:49,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-12 10:00:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:49,540 INFO L225 Difference]: With dead ends: 135 [2020-10-12 10:00:49,541 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 10:00:49,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 10:00:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-12 10:00:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 10:00:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-12 10:00:49,577 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 40 [2020-10-12 10:00:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:49,577 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-12 10:00:49,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-12 10:00:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 10:00:49,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:49,578 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:49,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:49,579 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -831837630, now seen corresponding path program 16 times [2020-10-12 10:00:49,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:49,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800756556] [2020-10-12 10:00:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:49,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:50,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:54,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 10:00:54,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:54,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:00:54,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 10:00:54,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:00:54,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:54,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:54,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:54,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:54,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:54,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:54,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-10-12 10:00:54,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800756556] [2020-10-12 10:00:54,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:54,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:54,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401142360] [2020-10-12 10:00:54,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:54,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:54,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:54,816 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 20 states. [2020-10-12 10:00:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:55,068 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2020-10-12 10:00:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:55,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-10-12 10:00:55,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:55,070 INFO L225 Difference]: With dead ends: 186 [2020-10-12 10:00:55,070 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 10:00:55,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 10:00:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-12 10:00:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 10:00:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-12 10:00:55,105 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 101 [2020-10-12 10:00:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:55,106 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-12 10:00:55,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-12 10:00:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 10:00:55,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:55,107 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:55,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:00:55,107 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash 855925908, now seen corresponding path program 17 times [2020-10-12 10:00:55,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:55,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420222245] [2020-10-12 10:00:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:00,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:01:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:00,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:00,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:00,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:00,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:00,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:00,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-12 10:01:00,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420222245] [2020-10-12 10:01:00,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:00,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:01:00,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412511857] [2020-10-12 10:01:00,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:01:00,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:00,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:01:00,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:01:00,420 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 21 states. [2020-10-12 10:01:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:00,795 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-12 10:01:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:01:00,799 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2020-10-12 10:01:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:00,800 INFO L225 Difference]: With dead ends: 195 [2020-10-12 10:01:00,800 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:01:00,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:01:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:01:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-12 10:01:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 10:01:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-12 10:01:00,880 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 106 [2020-10-12 10:01:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:00,881 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-12 10:01:00,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:01:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-12 10:01:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 10:01:00,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:00,883 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:00,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:01:00,884 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:00,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1813726594, now seen corresponding path program 18 times [2020-10-12 10:01:00,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:00,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130333157] [2020-10-12 10:01:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 10:01:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:01:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:06,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:06,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:06,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:06,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-12 10:01:06,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130333157] [2020-10-12 10:01:06,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:06,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:01:06,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632388270] [2020-10-12 10:01:06,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:01:06,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:06,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:01:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:01:06,197 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 22 states. [2020-10-12 10:01:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:06,543 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2020-10-12 10:01:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:01:06,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2020-10-12 10:01:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:06,544 INFO L225 Difference]: With dead ends: 204 [2020-10-12 10:01:06,544 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 10:01:06,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:01:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 10:01:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-12 10:01:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 10:01:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-12 10:01:06,576 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2020-10-12 10:01:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:06,577 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-12 10:01:06,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:01:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-12 10:01:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 10:01:06,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:06,578 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:06,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:06,579 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1230274516, now seen corresponding path program 19 times [2020-10-12 10:01:06,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:06,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644051925] [2020-10-12 10:01:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:11,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 10:01:11,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:11,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:01:11,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:11,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:01:11,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 10:01:11,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:01:11,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:11,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:11,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:11,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:11,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:11,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:11,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:11,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:11,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-10-12 10:01:11,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644051925] [2020-10-12 10:01:11,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:11,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:01:11,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60673500] [2020-10-12 10:01:11,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:01:11,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:11,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:01:11,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:01:11,896 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 23 states. [2020-10-12 10:01:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:12,204 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-12 10:01:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:01:12,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-10-12 10:01:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:12,206 INFO L225 Difference]: With dead ends: 213 [2020-10-12 10:01:12,206 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 10:01:12,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:01:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 10:01:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-12 10:01:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-12 10:01:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-12 10:01:12,250 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 116 [2020-10-12 10:01:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:12,251 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-12 10:01:12,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:01:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-12 10:01:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-12 10:01:12,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:12,252 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:12,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:12,252 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash 433828034, now seen corresponding path program 20 times [2020-10-12 10:01:12,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:12,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787587237] [2020-10-12 10:01:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:01:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 10:01:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:01:17,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:17,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:17,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:17,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:17,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:17,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:17,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-12 10:01:17,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787587237] [2020-10-12 10:01:17,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:17,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:01:17,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72390740] [2020-10-12 10:01:17,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:01:17,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:01:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:17,611 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 24 states. [2020-10-12 10:01:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:17,921 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2020-10-12 10:01:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:01:17,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-10-12 10:01:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:17,922 INFO L225 Difference]: With dead ends: 222 [2020-10-12 10:01:17,922 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 10:01:17,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 10:01:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-12 10:01:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 10:01:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-12 10:01:17,974 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 121 [2020-10-12 10:01:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:17,974 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-12 10:01:17,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:01:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-12 10:01:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 10:01:17,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:17,975 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:17,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:17,977 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 348752660, now seen corresponding path program 21 times [2020-10-12 10:01:17,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:17,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093171636] [2020-10-12 10:01:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:18,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:23,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 10:01:23,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:23,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:01:23,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:01:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:23,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:01:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:23,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:23,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:23,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:23,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:23,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:23,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-10-12 10:01:23,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093171636] [2020-10-12 10:01:23,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:23,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:01:23,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999558796] [2020-10-12 10:01:23,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:01:23,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:01:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:23,346 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 25 states. [2020-10-12 10:01:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:23,739 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2020-10-12 10:01:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:01:23,740 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-10-12 10:01:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:23,741 INFO L225 Difference]: With dead ends: 231 [2020-10-12 10:01:23,741 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 10:01:23,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 10:01:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-12 10:01:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 10:01:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-12 10:01:23,791 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 126 [2020-10-12 10:01:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:23,791 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-12 10:01:23,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:01:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-12 10:01:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-12 10:01:23,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:23,792 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:23,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:23,793 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 577530882, now seen corresponding path program 22 times [2020-10-12 10:01:23,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:23,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138521059] [2020-10-12 10:01:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:28,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:28,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-12 10:01:28,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:01:28,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:01:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 10:01:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:01:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:29,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:29,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-10-12 10:01:29,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138521059] [2020-10-12 10:01:29,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:29,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:01:29,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084702749] [2020-10-12 10:01:29,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:01:29,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:01:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:29,219 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 26 states. [2020-10-12 10:01:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:29,589 INFO L93 Difference]: Finished difference Result 240 states and 252 transitions. [2020-10-12 10:01:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:01:29,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-10-12 10:01:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:29,591 INFO L225 Difference]: With dead ends: 240 [2020-10-12 10:01:29,591 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 10:01:29,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 10:01:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-12 10:01:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 10:01:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2020-10-12 10:01:29,632 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 131 [2020-10-12 10:01:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:29,633 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2020-10-12 10:01:29,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:01:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2020-10-12 10:01:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 10:01:29,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:29,634 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:29,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:29,634 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash 33785428, now seen corresponding path program 23 times [2020-10-12 10:01:29,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:29,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920643417] [2020-10-12 10:01:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:34,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:34,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 10:01:34,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:34,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:01:34,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:01:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 10:01:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:01:34,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:35,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:35,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:35,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:35,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:35,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:35,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:35,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:35,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:35,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-10-12 10:01:35,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920643417] [2020-10-12 10:01:35,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:35,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:01:35,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938437205] [2020-10-12 10:01:35,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:01:35,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:01:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:35,035 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand 27 states. [2020-10-12 10:01:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:35,383 INFO L93 Difference]: Finished difference Result 249 states and 261 transitions. [2020-10-12 10:01:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:01:35,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2020-10-12 10:01:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:35,385 INFO L225 Difference]: With dead ends: 249 [2020-10-12 10:01:35,385 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 10:01:35,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 10:01:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-12 10:01:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 10:01:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-12 10:01:35,424 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 136 [2020-10-12 10:01:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:35,424 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-12 10:01:35,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:01:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-12 10:01:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 10:01:35,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:35,426 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:35,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:01:35,426 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2020772030, now seen corresponding path program 24 times [2020-10-12 10:01:35,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:35,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580654126] [2020-10-12 10:01:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:35,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:40,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:40,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 10:01:40,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:01:40,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:01:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:40,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:01:40,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:40,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:40,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:40,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:40,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:40,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:40,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:40,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:40,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:40,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-12 10:01:40,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580654126] [2020-10-12 10:01:40,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:40,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:01:40,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218729777] [2020-10-12 10:01:40,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:01:40,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:01:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:40,880 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 28 states. [2020-10-12 10:01:41,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:41,284 INFO L93 Difference]: Finished difference Result 258 states and 270 transitions. [2020-10-12 10:01:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:01:41,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2020-10-12 10:01:41,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:41,286 INFO L225 Difference]: With dead ends: 258 [2020-10-12 10:01:41,286 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 10:01:41,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 10:01:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-12 10:01:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 10:01:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-12 10:01:41,324 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 141 [2020-10-12 10:01:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:41,324 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-12 10:01:41,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:01:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-12 10:01:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 10:01:41,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:41,325 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:41,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:01:41,325 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:41,326 INFO L82 PathProgramCache]: Analyzing trace with hash -693997164, now seen corresponding path program 25 times [2020-10-12 10:01:41,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:41,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901142006] [2020-10-12 10:01:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:46,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:46,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 10:01:46,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:46,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:01:46,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:01:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:01:46,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:46,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:46,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:46,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:46,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:46,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:01:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-10-12 10:01:46,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901142006] [2020-10-12 10:01:46,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:46,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:01:46,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161230547] [2020-10-12 10:01:46,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:01:46,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:01:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:46,847 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 29 states. [2020-10-12 10:01:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:47,234 INFO L93 Difference]: Finished difference Result 267 states and 279 transitions. [2020-10-12 10:01:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:01:47,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2020-10-12 10:01:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:47,236 INFO L225 Difference]: With dead ends: 267 [2020-10-12 10:01:47,236 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 10:01:47,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 10:01:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-12 10:01:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 10:01:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-12 10:01:47,276 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 146 [2020-10-12 10:01:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:47,276 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-12 10:01:47,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:01:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-12 10:01:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-12 10:01:47,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:47,278 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:47,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:01:47,278 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:47,278 INFO L82 PathProgramCache]: Analyzing trace with hash 33477250, now seen corresponding path program 26 times [2020-10-12 10:01:47,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:47,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130136872] [2020-10-12 10:01:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:52,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:52,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-12 10:01:52,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:52,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:01:52,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:52,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:01:52,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:52,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:01:52,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:52,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:52,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:52,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:52,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:52,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:52,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:52,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:52,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:52,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-12 10:01:52,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130136872] [2020-10-12 10:01:52,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:52,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:01:52,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504579870] [2020-10-12 10:01:52,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:01:52,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:01:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:52,796 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 30 states. [2020-10-12 10:01:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:53,216 INFO L93 Difference]: Finished difference Result 276 states and 288 transitions. [2020-10-12 10:01:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:01:53,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2020-10-12 10:01:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:53,219 INFO L225 Difference]: With dead ends: 276 [2020-10-12 10:01:53,219 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 10:01:53,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 10:01:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-12 10:01:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 10:01:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2020-10-12 10:01:53,262 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 151 [2020-10-12 10:01:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:53,262 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2020-10-12 10:01:53,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:01:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2020-10-12 10:01:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 10:01:53,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:53,263 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:53,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:01:53,264 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1320792876, now seen corresponding path program 27 times [2020-10-12 10:01:53,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:53,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726808912] [2020-10-12 10:01:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:53,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:58,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:58,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 10:01:58,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:58,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:01:58,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:01:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 10:01:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:01:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:58,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:58,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:58,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:58,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:58,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:58,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:58,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-10-12 10:01:58,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726808912] [2020-10-12 10:01:58,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:58,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:58,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267953373] [2020-10-12 10:01:58,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:58,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:58,806 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 31 states. [2020-10-12 10:01:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:59,328 INFO L93 Difference]: Finished difference Result 285 states and 297 transitions. [2020-10-12 10:01:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:01:59,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2020-10-12 10:01:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:59,330 INFO L225 Difference]: With dead ends: 285 [2020-10-12 10:01:59,330 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 10:01:59,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 10:01:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-12 10:01:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 10:01:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-12 10:01:59,430 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 156 [2020-10-12 10:01:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:59,431 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-12 10:01:59,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-12 10:01:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-12 10:01:59,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:59,434 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:59,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:01:59,435 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash 25198018, now seen corresponding path program 28 times [2020-10-12 10:01:59,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:59,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440526254] [2020-10-12 10:01:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:59,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:59,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:59,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:04,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:04,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:02:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:05,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:05,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:05,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:05,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:05,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:05,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:05,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:05,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:05,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:05,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:05,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-10-12 10:02:05,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440526254] [2020-10-12 10:02:05,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:05,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:02:05,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138130484] [2020-10-12 10:02:05,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:02:05,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:02:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:02:05,068 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 32 states. [2020-10-12 10:02:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:05,481 INFO L93 Difference]: Finished difference Result 294 states and 306 transitions. [2020-10-12 10:02:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:02:05,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2020-10-12 10:02:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:05,484 INFO L225 Difference]: With dead ends: 294 [2020-10-12 10:02:05,484 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 10:02:05,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:02:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 10:02:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-12 10:02:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 10:02:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2020-10-12 10:02:05,526 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 161 [2020-10-12 10:02:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:05,527 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2020-10-12 10:02:05,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:02:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2020-10-12 10:02:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 10:02:05,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:05,528 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:05,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:05,528 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash 160372756, now seen corresponding path program 29 times [2020-10-12 10:02:05,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:05,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753679438] [2020-10-12 10:02:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:05,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:05,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:05,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:05,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:10,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:10,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 10:02:10,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:02:10,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:02:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 10:02:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:02:10,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:11,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:11,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:11,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:11,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:11,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:11,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:11,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-10-12 10:02:11,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753679438] [2020-10-12 10:02:11,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:11,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:02:11,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906848211] [2020-10-12 10:02:11,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:02:11,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:02:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:02:11,156 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand 33 states. [2020-10-12 10:02:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:11,669 INFO L93 Difference]: Finished difference Result 303 states and 315 transitions. [2020-10-12 10:02:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:02:11,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 166 [2020-10-12 10:02:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:11,672 INFO L225 Difference]: With dead ends: 303 [2020-10-12 10:02:11,672 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 10:02:11,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:02:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 10:02:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-12 10:02:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 10:02:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-12 10:02:11,734 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 166 [2020-10-12 10:02:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:11,734 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-12 10:02:11,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:02:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-12 10:02:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-12 10:02:11,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:11,736 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:11,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:02:11,736 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1395492606, now seen corresponding path program 30 times [2020-10-12 10:02:11,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:11,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356917452] [2020-10-12 10:02:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:11,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:11,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:16,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 10:02:16,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-12 10:02:16,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:02:16,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:16,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:02:16,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:17,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:17,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:17,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:17,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:17,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:17,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:17,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-10-12 10:02:17,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356917452] [2020-10-12 10:02:17,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:17,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:02:17,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621324549] [2020-10-12 10:02:17,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:02:17,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:17,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:02:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:17,422 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 34 states. [2020-10-12 10:02:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:17,924 INFO L93 Difference]: Finished difference Result 312 states and 324 transitions. [2020-10-12 10:02:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:02:17,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2020-10-12 10:02:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:17,926 INFO L225 Difference]: With dead ends: 312 [2020-10-12 10:02:17,926 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 10:02:17,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 10:02:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-12 10:02:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 10:02:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2020-10-12 10:02:17,972 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 171 [2020-10-12 10:02:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:17,972 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2020-10-12 10:02:17,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:02:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2020-10-12 10:02:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 10:02:17,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:17,973 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:17,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:02:17,973 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1340288172, now seen corresponding path program 31 times [2020-10-12 10:02:17,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:17,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813444010] [2020-10-12 10:02:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:17,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:18,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:19,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:23,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:02:23,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:23,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:23,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:23,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:23,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:23,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:23,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:23,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:23,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-10-12 10:02:23,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813444010] [2020-10-12 10:02:23,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:23,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:02:23,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016077989] [2020-10-12 10:02:23,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:02:23,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:23,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:02:23,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:23,674 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 35 states. [2020-10-12 10:02:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:24,200 INFO L93 Difference]: Finished difference Result 321 states and 333 transitions. [2020-10-12 10:02:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:02:24,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2020-10-12 10:02:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:24,202 INFO L225 Difference]: With dead ends: 321 [2020-10-12 10:02:24,202 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 10:02:24,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 10:02:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-12 10:02:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 10:02:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-10-12 10:02:24,260 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 176 [2020-10-12 10:02:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:24,260 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-10-12 10:02:24,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:02:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-10-12 10:02:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-12 10:02:24,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:24,262 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:24,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:02:24,262 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash -508246974, now seen corresponding path program 32 times [2020-10-12 10:02:24,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:24,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149063024] [2020-10-12 10:02:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:24,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:24,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:24,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:02:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:29,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:29,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:29,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:29,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:29,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:29,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:29,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-10-12 10:02:30,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149063024] [2020-10-12 10:02:30,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:30,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:02:30,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902402281] [2020-10-12 10:02:30,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:02:30,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:02:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:30,023 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 36 states. [2020-10-12 10:02:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:30,556 INFO L93 Difference]: Finished difference Result 330 states and 342 transitions. [2020-10-12 10:02:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:02:30,557 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 181 [2020-10-12 10:02:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:30,559 INFO L225 Difference]: With dead ends: 330 [2020-10-12 10:02:30,559 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 10:02:30,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 10:02:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-12 10:02:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 10:02:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2020-10-12 10:02:30,619 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 181 [2020-10-12 10:02:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:30,620 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2020-10-12 10:02:30,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:02:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2020-10-12 10:02:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-12 10:02:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:30,621 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:30,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:02:30,621 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash -829456748, now seen corresponding path program 33 times [2020-10-12 10:02:30,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:30,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087215256] [2020-10-12 10:02:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:30,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:30,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:30,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:31,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:35,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-12 10:02:35,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:02:35,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:02:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-12 10:02:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:02:35,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:36,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:36,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:36,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:36,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:36,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:36,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:36,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:36,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:36,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:36,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-10-12 10:02:36,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087215256] [2020-10-12 10:02:36,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:36,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:02:36,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741080580] [2020-10-12 10:02:36,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:02:36,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:36,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:02:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:36,402 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand 37 states. [2020-10-12 10:02:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:36,892 INFO L93 Difference]: Finished difference Result 339 states and 351 transitions. [2020-10-12 10:02:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:02:36,893 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 186 [2020-10-12 10:02:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:36,894 INFO L225 Difference]: With dead ends: 339 [2020-10-12 10:02:36,894 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 10:02:36,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 10:02:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-12 10:02:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 10:02:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-12 10:02:36,969 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 186 [2020-10-12 10:02:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:36,969 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-12 10:02:36,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:02:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-12 10:02:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-12 10:02:36,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:36,971 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:36,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:02:36,971 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 887578498, now seen corresponding path program 34 times [2020-10-12 10:02:36,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:36,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877068385] [2020-10-12 10:02:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:37,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking...