/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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:06:59,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:06:59,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:06:59,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:06:59,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:06:59,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:06:59,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:06:59,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:06:59,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:06:59,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:06:59,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:06:59,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:06:59,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:06:59,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:06:59,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:06:59,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:06:59,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:06:59,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:06:59,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:06:59,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:06:59,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:06:59,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:06:59,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:06:59,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:06:59,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:06:59,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:06:59,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:06:59,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:06:59,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:06:59,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:06:59,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:06:59,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:06:59,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:06:59,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:06:59,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:06:59,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:06:59,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:06:59,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:06:59,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:06:59,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:06:59,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:06:59,390 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 [2020-09-25 02:06:59,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:06:59,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:06:59,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:06:59,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:06:59,441 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:06:59,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:06:59,442 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:06:59,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:06:59,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:06:59,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:06:59,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:06:59,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:06:59,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:06:59,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:06:59,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:06:59,444 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:06:59,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:06:59,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:06:59,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:06:59,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:06:59,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:06:59,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:06:59,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:06:59,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:06:59,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:06:59,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:06:59,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:06:59,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:06:59,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:06:59,446 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:06:59,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:07:00,012 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:07:00,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:07:00,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:07:00,020 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:07:00,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-25 02:07:00,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a98bc0b9/b317effd960646f8b43131ea0be0e24c/FLAGc3e82c8ce [2020-09-25 02:07:00,663 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:07:00,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-25 02:07:00,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a98bc0b9/b317effd960646f8b43131ea0be0e24c/FLAGc3e82c8ce [2020-09-25 02:07:01,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a98bc0b9/b317effd960646f8b43131ea0be0e24c [2020-09-25 02:07:01,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:07:01,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:07:01,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:01,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:07:01,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:07:01,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36687376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01, skipping insertion in model container [2020-09-25 02:07:01,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:07:01,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:07:01,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:01,356 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:07:01,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:01,402 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:07:01,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01 WrapperNode [2020-09-25 02:07:01,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:01,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:07:01,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:07:01,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:07:01,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:07:01,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:07:01,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:07:01,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:07:01,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (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 [2020-09-25 02:07:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:07:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:07:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 02:07:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:07:01,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:07:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:07:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 02:07:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 02:07:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:07:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:07:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:07:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:07:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 02:07:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:07:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:07:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:07:02,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:07:02,012 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 02:07:02,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:02 BoogieIcfgContainer [2020-09-25 02:07:02,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:07:02,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:07:02,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:07:02,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:07:02,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:07:01" (1/3) ... [2020-09-25 02:07:02,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7525a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:02, skipping insertion in model container [2020-09-25 02:07:02,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (2/3) ... [2020-09-25 02:07:02,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7525a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:02, skipping insertion in model container [2020-09-25 02:07:02,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:02" (3/3) ... [2020-09-25 02:07:02,027 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-25 02:07:02,038 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:07:02,048 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:07:02,071 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:07:02,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:07:02,099 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:07:02,099 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:07:02,099 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:07:02,100 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:07:02,100 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:07:02,100 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:07:02,100 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:07:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-25 02:07:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 02:07:02,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:02,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:02,133 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:02,140 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-09-25 02:07:02,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:02,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614301557] [2020-09-25 02:07:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:02,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 02:07:02,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:02,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-09-25 02:07:02,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-25 02:07:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:07:02,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:02,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:02,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:02,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:07:02,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:02,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:02,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:02,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:02,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 02:07:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:02,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:02,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 02:07:02,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:02,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:02,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:02,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614301557] [2020-09-25 02:07:02,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:02,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:07:02,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669297110] [2020-09-25 02:07:02,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:07:02,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:07:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:07:02,862 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-09-25 02:07:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:03,044 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-09-25 02:07:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:07:03,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-09-25 02:07:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:03,061 INFO L225 Difference]: With dead ends: 124 [2020-09-25 02:07:03,062 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 02:07:03,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:07:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 02:07:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-25 02:07:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 02:07:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 02:07:03,136 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-09-25 02:07:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:03,138 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 02:07:03,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:07:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 02:07:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 02:07:03,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:03,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:03,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:07:03,144 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-09-25 02:07:03,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:03,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009904680] [2020-09-25 02:07:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 02:07:04,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:04,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-25 02:07:04,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:07:04,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:07:04,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:07:04,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:04,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:04,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:04,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:04,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:04,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:04,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:04,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:04,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-25 02:07:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:04,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:04,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:04,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:04,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:04,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009904680] [2020-09-25 02:07:04,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:04,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:07:04,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379019751] [2020-09-25 02:07:04,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:07:04,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:07:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:07:04,258 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-09-25 02:07:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:04,391 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-09-25 02:07:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:07:04,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-25 02:07:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:04,393 INFO L225 Difference]: With dead ends: 104 [2020-09-25 02:07:04,394 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 02:07:04,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:07:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 02:07:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-09-25 02:07:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 02:07:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-25 02:07:04,405 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-09-25 02:07:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:04,406 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-25 02:07:04,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:07:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-25 02:07:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 02:07:04,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:04,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:04,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:07:04,409 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-09-25 02:07:04,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:04,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314977247] [2020-09-25 02:07:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:05,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:05,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 02:07:05,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:05,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1516 [2020-09-25 02:07:05,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:07:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:07:05,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:07:05,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:06,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:06,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:06,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:06,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:06,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:06,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:06,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:06,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 02:07:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:06,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:06,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:06,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:06,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:06,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:06,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:06,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:06,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:06,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:06,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:06,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314977247] [2020-09-25 02:07:06,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:06,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:07:06,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260226473] [2020-09-25 02:07:06,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:07:06,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:07:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:07:06,071 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 6 states. [2020-09-25 02:07:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:06,280 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-09-25 02:07:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:07:06,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-09-25 02:07:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:06,282 INFO L225 Difference]: With dead ends: 114 [2020-09-25 02:07:06,282 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 02:07:06,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 02:07:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-09-25 02:07:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 02:07:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-09-25 02:07:06,294 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 56 [2020-09-25 02:07:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:06,295 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-09-25 02:07:06,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:07:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-09-25 02:07:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 02:07:06,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:06,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:06,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:07:06,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash 278397012, now seen corresponding path program 2 times [2020-09-25 02:07:06,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:06,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116576285] [2020-09-25 02:07:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:06,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:06,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:08,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:08,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 02:07:08,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:08,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-09-25 02:07:08,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:08,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 02:07:08,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 02:07:08,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 02:07:08,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:07:08,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:08,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:08,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:08,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:08,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:08,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:08,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:08,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:08,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-25 02:07:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:08,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:08,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:08,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:08,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 02:07:08,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:08,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:08,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:08,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:08,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 02:07:08,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116576285] [2020-09-25 02:07:08,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:08,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 02:07:08,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796324680] [2020-09-25 02:07:08,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:07:08,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:07:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:07:08,848 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 9 states. [2020-09-25 02:07:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:09,285 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-09-25 02:07:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:07:09,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-09-25 02:07:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:09,287 INFO L225 Difference]: With dead ends: 92 [2020-09-25 02:07:09,288 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 02:07:09,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:07:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 02:07:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-09-25 02:07:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 02:07:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-09-25 02:07:09,297 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 66 [2020-09-25 02:07:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:09,298 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-09-25 02:07:09,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:07:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-09-25 02:07:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 02:07:09,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:09,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:09,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:07:09,300 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash -327292308, now seen corresponding path program 1 times [2020-09-25 02:07:09,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:09,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671667161] [2020-09-25 02:07:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:09,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:09,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:10,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:14,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:14,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 02:07:14,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:14,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 02:07:14,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:07:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 02:07:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 02:07:14,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:14,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:14,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:14,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:14,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:14,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:14,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:14,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:14,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:14,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 02:07:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:14,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:14,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:14,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:14,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:14,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:14,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:14,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:14,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 02:07:14,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671667161] [2020-09-25 02:07:14,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:14,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:07:14,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228058191] [2020-09-25 02:07:14,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:07:14,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:14,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:07:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:07:14,659 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-09-25 02:07:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:15,089 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-09-25 02:07:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 02:07:15,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-09-25 02:07:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:15,093 INFO L225 Difference]: With dead ends: 98 [2020-09-25 02:07:15,094 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 02:07:15,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:07:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 02:07:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-09-25 02:07:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 02:07:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-09-25 02:07:15,113 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 72 [2020-09-25 02:07:15,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:15,114 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-09-25 02:07:15,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:07:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-09-25 02:07:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-25 02:07:15,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:15,123 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:15,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:07:15,123 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -262020476, now seen corresponding path program 2 times [2020-09-25 02:07:15,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:15,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638890239] [2020-09-25 02:07:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:15,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:17,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:20,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 02:07:20,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:20,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 02:07:20,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:07:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:07:20,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 02:07:20,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:20,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:20,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:20,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:20,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:20,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:20,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:20,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:20,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:20,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:20,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-25 02:07:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:20,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:20,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:20,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:20,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:20,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:20,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:20,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 02:07:20,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638890239] [2020-09-25 02:07:20,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:20,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:07:20,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387656272] [2020-09-25 02:07:20,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:07:20,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:07:20,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:20,278 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 8 states. [2020-09-25 02:07:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:20,499 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2020-09-25 02:07:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:07:20,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-09-25 02:07:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:20,501 INFO L225 Difference]: With dead ends: 140 [2020-09-25 02:07:20,501 INFO L226 Difference]: Without dead ends: 97 [2020-09-25 02:07:20,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:07:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-25 02:07:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-09-25 02:07:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 02:07:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-09-25 02:07:20,512 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2020-09-25 02:07:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:20,513 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-09-25 02:07:20,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:07:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-09-25 02:07:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-25 02:07:20,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:20,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:20,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:07:20,515 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash -739332130, now seen corresponding path program 3 times [2020-09-25 02:07:20,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:20,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278054182] [2020-09-25 02:07:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:20,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:25,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:25,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-25 02:07:25,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 02:07:25,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 02:07:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-25 02:07:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 02:07:25,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:25,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:25,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:25,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:25,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:25,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:25,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-25 02:07:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:25,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:25,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:25,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:25,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:25,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:25,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:25,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-25 02:07:25,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278054182] [2020-09-25 02:07:25,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:25,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:07:25,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959685794] [2020-09-25 02:07:25,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:07:25,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:25,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:07:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:07:25,834 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 11 states. [2020-09-25 02:07:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:26,246 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-09-25 02:07:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:07:26,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2020-09-25 02:07:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:26,247 INFO L225 Difference]: With dead ends: 114 [2020-09-25 02:07:26,248 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 02:07:26,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-25 02:07:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 02:07:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-09-25 02:07:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-25 02:07:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-09-25 02:07:26,256 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2020-09-25 02:07:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:26,256 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-09-25 02:07:26,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:07:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-09-25 02:07:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 02:07:26,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:26,258 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:26,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:07:26,258 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:26,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:26,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1039223414, now seen corresponding path program 4 times [2020-09-25 02:07:26,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:26,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733791171] [2020-09-25 02:07:26,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:26,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:28,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:31,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:31,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-25 02:07:31,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:31,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 02:07:31,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:07:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:07:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 02:07:31,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:31,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:31,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:31,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:31,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:31,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:07:31,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:31,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:31,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:31,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:31,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:31,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-25 02:07:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:31,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:31,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:31,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:31,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:31,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:31,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:31,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:31,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:31,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:31,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 02:07:31,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733791171] [2020-09-25 02:07:31,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:31,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:07:31,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720442982] [2020-09-25 02:07:31,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:07:31,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:07:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:07:31,399 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 10 states. [2020-09-25 02:07:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:31,638 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-25 02:07:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:07:31,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2020-09-25 02:07:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:31,640 INFO L225 Difference]: With dead ends: 162 [2020-09-25 02:07:31,640 INFO L226 Difference]: Without dead ends: 113 [2020-09-25 02:07:31,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:07:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-25 02:07:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2020-09-25 02:07:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-25 02:07:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-09-25 02:07:31,653 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2020-09-25 02:07:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:31,654 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-09-25 02:07:31,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:07:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-09-25 02:07:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-25 02:07:31,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:31,656 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:31,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:07:31,656 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -335797296, now seen corresponding path program 5 times [2020-09-25 02:07:31,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:31,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079025931] [2020-09-25 02:07:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:31,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:34,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:36,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:36,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-25 02:07:36,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:36,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 02:07:36,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:07:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-09-25 02:07:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 02:07:36,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:36,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:36,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:36,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:36,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:36,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:36,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:36,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:36,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:36,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:36,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:36,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-25 02:07:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:36,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:36,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:36,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:36,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:36,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:36,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-25 02:07:36,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079025931] [2020-09-25 02:07:36,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:36,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:07:36,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737501382] [2020-09-25 02:07:36,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:07:36,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:07:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:07:36,997 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 12 states. [2020-09-25 02:07:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:37,455 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2020-09-25 02:07:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 02:07:37,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-25 02:07:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:37,457 INFO L225 Difference]: With dead ends: 130 [2020-09-25 02:07:37,457 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 02:07:37,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-09-25 02:07:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 02:07:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-09-25 02:07:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-25 02:07:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-09-25 02:07:37,472 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 104 [2020-09-25 02:07:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:37,473 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-09-25 02:07:37,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:07:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-09-25 02:07:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 02:07:37,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:37,474 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:37,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:07:37,474 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash -964656920, now seen corresponding path program 6 times [2020-09-25 02:07:37,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:37,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780165911] [2020-09-25 02:07:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:42,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:42,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 02:07:42,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:42,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 02:07:42,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:42,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:07:42,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-09-25 02:07:42,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 02:07:42,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:42,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:42,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:42,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:42,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:42,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:42,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:42,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:42,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:42,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:42,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:42,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-25 02:07:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:42,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:42,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:42,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:42,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:42,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:42,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:42,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-25 02:07:42,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780165911] [2020-09-25 02:07:42,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:42,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:07:42,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482489866] [2020-09-25 02:07:42,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:07:42,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:07:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:07:42,804 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 13 states. [2020-09-25 02:07:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:43,389 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-09-25 02:07:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 02:07:43,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-09-25 02:07:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:43,392 INFO L225 Difference]: With dead ends: 136 [2020-09-25 02:07:43,392 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 02:07:43,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-25 02:07:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 02:07:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-09-25 02:07:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 02:07:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-09-25 02:07:43,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 110 [2020-09-25 02:07:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:43,401 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-09-25 02:07:43,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:07:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-09-25 02:07:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-25 02:07:43,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:43,406 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:43,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:07:43,406 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1193323520, now seen corresponding path program 7 times [2020-09-25 02:07:43,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:43,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733437713] [2020-09-25 02:07:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:43,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:48,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:48,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-25 02:07:48,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:07:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 02:07:48,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:07:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:07:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 02:07:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:48,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:48,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:48,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:48,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:48,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:48,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:48,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:48,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-25 02:07:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:48,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:48,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 02:07:48,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:48,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:48,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 02:07:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:48,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-25 02:07:48,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733437713] [2020-09-25 02:07:48,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:48,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:07:48,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132534689] [2020-09-25 02:07:48,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:07:48,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:07:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:07:48,585 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 12 states. [2020-09-25 02:07:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:48,856 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2020-09-25 02:07:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:07:48,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 116 [2020-09-25 02:07:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:48,857 INFO L225 Difference]: With dead ends: 196 [2020-09-25 02:07:48,857 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 02:07:48,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:07:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 02:07:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-09-25 02:07:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 02:07:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-09-25 02:07:48,863 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 116 [2020-09-25 02:07:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:48,864 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-09-25 02:07:48,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:07:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-09-25 02:07:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-25 02:07:48,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:48,865 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:48,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 02:07:48,866 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1845320230, now seen corresponding path program 8 times [2020-09-25 02:07:48,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:48,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513846771] [2020-09-25 02:07:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:48,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:48,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking...