/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:37:52,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:37:52,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:37:52,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:37:52,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:37:52,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:37:52,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:37:52,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:37:52,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:37:52,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:37:52,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:37:52,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:37:52,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:37:52,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:37:52,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:37:52,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:37:52,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:37:52,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:37:52,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:37:52,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:37:52,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:37:52,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:37:52,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:37:52,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:37:52,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:37:52,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:37:52,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:37:52,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:37:52,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:37:52,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:37:52,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:37:52,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:37:52,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:37:52,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:37:52,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:37:52,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:37:52,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:37:52,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:37:52,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:37:52,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:37:52,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:37:52,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 09:37:52,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:37:52,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:37:52,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:37:52,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:37:52,546 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:37:52,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:37:52,546 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:37:52,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:37:52,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:37:52,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:37:52,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:37:52,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:37:52,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:37:52,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:37:52,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:37:52,548 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:37:52,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:37:52,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:37:52,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:37:52,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:37:52,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:37:52,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:37:52,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:37:52,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:37:52,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:37:52,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:37:52,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:37:52,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:37:52,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:37:52,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 09:37:52,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:37:52,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:37:52,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:37:52,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:37:52,988 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:37:52,989 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label42.c [2020-10-13 09:37:53,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33f09df48/adecec101f6145928c8cebda8b3cbf98/FLAGf7ecfaac6 [2020-10-13 09:37:54,026 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:37:54,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label42.c [2020-10-13 09:37:54,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33f09df48/adecec101f6145928c8cebda8b3cbf98/FLAGf7ecfaac6 [2020-10-13 09:37:54,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33f09df48/adecec101f6145928c8cebda8b3cbf98 [2020-10-13 09:37:54,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:37:54,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:37:54,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:37:54,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:37:54,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:37:54,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:54" (1/1) ... [2020-10-13 09:37:54,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1573d552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:54, skipping insertion in model container [2020-10-13 09:37:54,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:54" (1/1) ... [2020-10-13 09:37:54,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:37:54,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:37:56,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:37:56,428 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:37:56,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:37:56,932 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:37:56,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56 WrapperNode [2020-10-13 09:37:56,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:37:56,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:37:56,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:37:56,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:37:56,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:56,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:57,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:57,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:57,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:57,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:57,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... [2020-10-13 09:37:57,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:37:57,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:37:57,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:37:57,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:37:57,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:37:57,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:37:57,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:37:57,518 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:37:57,518 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:37:57,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:37:57,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:37:57,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:37:57,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:37:57,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:37:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:37:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:37:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:37:57,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:38:07,463 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:38:07,464 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:38:07,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:07 BoogieIcfgContainer [2020-10-13 09:38:07,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:38:07,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:38:07,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:38:07,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:38:07,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:37:54" (1/3) ... [2020-10-13 09:38:07,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce7f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:07, skipping insertion in model container [2020-10-13 09:38:07,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:56" (2/3) ... [2020-10-13 09:38:07,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce7f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:07, skipping insertion in model container [2020-10-13 09:38:07,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:07" (3/3) ... [2020-10-13 09:38:07,485 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label42.c [2020-10-13 09:38:07,497 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:38:07,508 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:38:07,525 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:38:07,558 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:38:07,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:38:07,559 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:38:07,559 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:38:07,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:38:07,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:38:07,560 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:38:07,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:38:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-13 09:38:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 09:38:07,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:07,617 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] [2020-10-13 09:38:07,618 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1436696441, now seen corresponding path program 1 times [2020-10-13 09:38:07,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:07,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503489853] [2020-10-13 09:38:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:07,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:08,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:08,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 09:38:08,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-13 09:38:08,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:38:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:38:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 09:38:08,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 09:38:08,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:08,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:08,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:08,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 09:38:08,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:38:08,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:38:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:08,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503489853] [2020-10-13 09:38:08,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:38:08,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:38:08,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387890290] [2020-10-13 09:38:08,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:38:08,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:08,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:38:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:38:08,639 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2020-10-13 09:38:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:38:19,053 INFO L93 Difference]: Finished difference Result 1692 states and 3091 transitions. [2020-10-13 09:38:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:38:19,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-13 09:38:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:38:19,097 INFO L225 Difference]: With dead ends: 1692 [2020-10-13 09:38:19,098 INFO L226 Difference]: Without dead ends: 1012 [2020-10-13 09:38:19,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:38:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-10-13 09:38:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1002. [2020-10-13 09:38:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1002 states. [2020-10-13 09:38:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1542 transitions. [2020-10-13 09:38:19,233 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1542 transitions. Word has length 46 [2020-10-13 09:38:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:38:19,234 INFO L479 AbstractCegarLoop]: Abstraction has 1002 states and 1542 transitions. [2020-10-13 09:38:19,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:38:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1542 transitions. [2020-10-13 09:38:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 09:38:19,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:19,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:38:19,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:38:19,242 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash -462629692, now seen corresponding path program 1 times [2020-10-13 09:38:19,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:19,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331357646] [2020-10-13 09:38:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:19,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:19,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:21,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:21,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 09:38:21,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:38:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1840 [2020-10-13 09:38:21,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:38:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 09:38:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 09:38:21,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 09:38:21,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:21,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:21,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:21,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:21,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 09:38:21,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:38:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:38:21,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:38:21,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:38:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:21,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:21,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:21,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 09:38:21,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:21,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 09:38:21,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:21,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:21,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:21,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 09:38:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 09:38:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:21,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331357646] [2020-10-13 09:38:21,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:38:21,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:38:21,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477997248] [2020-10-13 09:38:21,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:38:21,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:21,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:38:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:38:21,548 INFO L87 Difference]: Start difference. First operand 1002 states and 1542 transitions. Second operand 5 states. [2020-10-13 09:38:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:38:38,215 INFO L93 Difference]: Finished difference Result 2884 states and 4479 transitions. [2020-10-13 09:38:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:38:38,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-13 09:38:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:38:38,242 INFO L225 Difference]: With dead ends: 2884 [2020-10-13 09:38:38,242 INFO L226 Difference]: Without dead ends: 1888 [2020-10-13 09:38:38,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:38:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2020-10-13 09:38:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1884. [2020-10-13 09:38:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1884 states. [2020-10-13 09:38:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2587 transitions. [2020-10-13 09:38:38,335 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2587 transitions. Word has length 117 [2020-10-13 09:38:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:38:38,338 INFO L479 AbstractCegarLoop]: Abstraction has 1884 states and 2587 transitions. [2020-10-13 09:38:38,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:38:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2587 transitions. [2020-10-13 09:38:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 09:38:38,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:38,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:38:38,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:38:38,353 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash 975469648, now seen corresponding path program 1 times [2020-10-13 09:38:38,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:38,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608786135] [2020-10-13 09:38:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:38,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:39,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:39,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 09:38:39,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:38:39,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-13 09:38:39,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:39,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:38:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 09:38:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 09:38:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:39,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:39,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:39,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:39,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:39,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:39,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:38:39,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:38:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:39,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:38:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:38:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:39,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 09:38:39,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-13 09:38:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 09:38:39,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:39,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608786135] [2020-10-13 09:38:39,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:38:39,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:38:39,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676735977] [2020-10-13 09:38:39,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:38:39,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:38:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:38:39,595 INFO L87 Difference]: Start difference. First operand 1884 states and 2587 transitions. Second operand 5 states. [2020-10-13 09:38:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:38:53,361 INFO L93 Difference]: Finished difference Result 4659 states and 6588 transitions. [2020-10-13 09:38:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:38:53,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-13 09:38:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:38:53,378 INFO L225 Difference]: With dead ends: 4659 [2020-10-13 09:38:53,378 INFO L226 Difference]: Without dead ends: 2781 [2020-10-13 09:38:53,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:38:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2020-10-13 09:38:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2775. [2020-10-13 09:38:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2775 states. [2020-10-13 09:38:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3663 transitions. [2020-10-13 09:38:53,459 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3663 transitions. Word has length 120 [2020-10-13 09:38:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:38:53,459 INFO L479 AbstractCegarLoop]: Abstraction has 2775 states and 3663 transitions. [2020-10-13 09:38:53,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:38:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3663 transitions. [2020-10-13 09:38:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 09:38:53,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:53,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-13 09:38:53,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:38:53,462 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1743671988, now seen corresponding path program 1 times [2020-10-13 09:38:53,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:53,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418345577] [2020-10-13 09:38:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:53,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:54,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:54,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 09:38:54,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:38:54,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-13 09:38:54,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:38:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 09:38:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 09:38:54,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 09:38:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:54,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:54,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:54,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:38:54,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:54,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:38:54,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:54,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:38:54,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:38:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:38:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:54,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:54,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:54,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 09:38:54,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:54,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 09:38:54,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 09:38:54,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:54,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418345577] [2020-10-13 09:38:54,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:38:54,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:38:54,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333349107] [2020-10-13 09:38:54,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:38:54,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:38:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:38:54,674 INFO L87 Difference]: Start difference. First operand 2775 states and 3663 transitions. Second operand 5 states. [2020-10-13 09:39:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:05,393 INFO L93 Difference]: Finished difference Result 6887 states and 9370 transitions. [2020-10-13 09:39:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:05,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-10-13 09:39:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:05,420 INFO L225 Difference]: With dead ends: 6887 [2020-10-13 09:39:05,421 INFO L226 Difference]: Without dead ends: 4118 [2020-10-13 09:39:05,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-10-13 09:39:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 4111. [2020-10-13 09:39:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4111 states. [2020-10-13 09:39:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 5198 transitions. [2020-10-13 09:39:05,533 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 5198 transitions. Word has length 125 [2020-10-13 09:39:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:05,533 INFO L479 AbstractCegarLoop]: Abstraction has 4111 states and 5198 transitions. [2020-10-13 09:39:05,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:39:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 5198 transitions. [2020-10-13 09:39:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 09:39:05,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:05,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:39:05,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 09:39:05,536 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1104572304, now seen corresponding path program 1 times [2020-10-13 09:39:05,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:05,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992465398] [2020-10-13 09:39:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:06,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:06,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 09:39:06,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:39:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-13 09:39:06,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 09:39:06,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 09:39:06,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:06,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:06,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:06,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:06,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:06,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:06,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:39:06,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:06,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:06,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:06,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:06,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 09:39:06,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:06,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 09:39:06,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:06,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:06,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:06,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 09:39:06,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:06,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992465398] [2020-10-13 09:39:06,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:06,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:39:06,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440900319] [2020-10-13 09:39:06,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:39:06,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:39:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:06,662 INFO L87 Difference]: Start difference. First operand 4111 states and 5198 transitions. Second operand 5 states. [2020-10-13 09:39:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:20,335 INFO L93 Difference]: Finished difference Result 9559 states and 12444 transitions. [2020-10-13 09:39:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:20,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-13 09:39:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:20,364 INFO L225 Difference]: With dead ends: 9559 [2020-10-13 09:39:20,365 INFO L226 Difference]: Without dead ends: 5454 [2020-10-13 09:39:20,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5454 states. [2020-10-13 09:39:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5454 to 5006. [2020-10-13 09:39:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5006 states. [2020-10-13 09:39:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 6254 transitions. [2020-10-13 09:39:20,506 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 6254 transitions. Word has length 143 [2020-10-13 09:39:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:20,507 INFO L479 AbstractCegarLoop]: Abstraction has 5006 states and 6254 transitions. [2020-10-13 09:39:20,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:39:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 6254 transitions. [2020-10-13 09:39:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 09:39:20,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:20,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:39:20,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 09:39:20,511 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash -442015768, now seen corresponding path program 1 times [2020-10-13 09:39:20,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:20,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662590005] [2020-10-13 09:39:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:20,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:20,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:21,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:25,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:25,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 09:39:25,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 09:39:25,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4802 [2020-10-13 09:39:25,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-13 09:39:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 09:39:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:25,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:25,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:25,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:25,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:25,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 09:39:25,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:25,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:39:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:25,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:25,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 09:39:25,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-13 09:39:25,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:25,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:25,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:25,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 09:39:25,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:25,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662590005] [2020-10-13 09:39:25,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:25,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:39:25,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277705072] [2020-10-13 09:39:25,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:39:25,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:25,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:39:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:25,724 INFO L87 Difference]: Start difference. First operand 5006 states and 6254 transitions. Second operand 6 states. [2020-10-13 09:39:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:49,565 INFO L93 Difference]: Finished difference Result 18334 states and 23672 transitions. [2020-10-13 09:39:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:39:49,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2020-10-13 09:39:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:49,636 INFO L225 Difference]: With dead ends: 18334 [2020-10-13 09:39:49,636 INFO L226 Difference]: Without dead ends: 13334 [2020-10-13 09:39:49,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:39:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2020-10-13 09:39:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 12026. [2020-10-13 09:39:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12026 states. [2020-10-13 09:39:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12026 states to 12026 states and 15023 transitions. [2020-10-13 09:39:50,078 INFO L78 Accepts]: Start accepts. Automaton has 12026 states and 15023 transitions. Word has length 147 [2020-10-13 09:39:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:50,078 INFO L479 AbstractCegarLoop]: Abstraction has 12026 states and 15023 transitions. [2020-10-13 09:39:50,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:39:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12026 states and 15023 transitions. [2020-10-13 09:39:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-13 09:39:50,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:50,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:39:50,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 09:39:50,085 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1981041928, now seen corresponding path program 1 times [2020-10-13 09:39:50,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:50,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430636701] [2020-10-13 09:39:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:50,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:50,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:51,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:51,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:51,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 09:39:51,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:39:51,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-13 09:39:51,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-13 09:39:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 09:39:51,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:52,052 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-10-13 09:39:52,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:52,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:52,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:52,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:52,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:52,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:39:52,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:52,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:52,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:52,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:52,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:52,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:52,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 09:39:52,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:52,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-13 09:39:52,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:52,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:52,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:52,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 09:39:52,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:39:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:52,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430636701] [2020-10-13 09:39:52,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:52,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:39:52,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883333611] [2020-10-13 09:39:52,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:39:52,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:39:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:52,550 INFO L87 Difference]: Start difference. First operand 12026 states and 15023 transitions. Second operand 5 states. [2020-10-13 09:40:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:03,987 INFO L93 Difference]: Finished difference Result 24080 states and 30124 transitions. [2020-10-13 09:40:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:03,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2020-10-13 09:40:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:04,074 INFO L225 Difference]: With dead ends: 24080 [2020-10-13 09:40:04,075 INFO L226 Difference]: Without dead ends: 12030 [2020-10-13 09:40:04,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12030 states. [2020-10-13 09:40:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12030 to 12026. [2020-10-13 09:40:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12026 states. [2020-10-13 09:40:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12026 states to 12026 states and 15019 transitions. [2020-10-13 09:40:04,411 INFO L78 Accepts]: Start accepts. Automaton has 12026 states and 15019 transitions. Word has length 174 [2020-10-13 09:40:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:04,412 INFO L479 AbstractCegarLoop]: Abstraction has 12026 states and 15019 transitions. [2020-10-13 09:40:04,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 12026 states and 15019 transitions. [2020-10-13 09:40:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-13 09:40:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:04,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:40:04,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 09:40:04,420 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:04,421 INFO L82 PathProgramCache]: Analyzing trace with hash 909482819, now seen corresponding path program 1 times [2020-10-13 09:40:04,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:04,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764895198] [2020-10-13 09:40:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:04,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:06,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:06,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:06,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 09:40:06,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:40:06,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-13 09:40:06,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:06,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-13 09:40:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:40:06,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:06,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:06,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:06,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:06,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:06,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:40:06,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:06,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:06,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:06,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:06,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:06,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 09:40:06,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:06,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-13 09:40:06,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:06,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-13 09:40:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:40:06,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:40:07,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764895198] [2020-10-13 09:40:07,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:40:07,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:40:07,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979198877] [2020-10-13 09:40:07,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:07,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:07,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:07,067 INFO L87 Difference]: Start difference. First operand 12026 states and 15019 transitions. Second operand 5 states. [2020-10-13 09:40:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:21,632 INFO L93 Difference]: Finished difference Result 27997 states and 36149 transitions. [2020-10-13 09:40:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:21,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2020-10-13 09:40:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:21,700 INFO L225 Difference]: With dead ends: 27997 [2020-10-13 09:40:21,701 INFO L226 Difference]: Without dead ends: 15977 [2020-10-13 09:40:21,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15977 states. [2020-10-13 09:40:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15977 to 15104. [2020-10-13 09:40:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15104 states. [2020-10-13 09:40:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15104 states to 15104 states and 18714 transitions. [2020-10-13 09:40:22,059 INFO L78 Accepts]: Start accepts. Automaton has 15104 states and 18714 transitions. Word has length 190 [2020-10-13 09:40:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:22,060 INFO L479 AbstractCegarLoop]: Abstraction has 15104 states and 18714 transitions. [2020-10-13 09:40:22,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15104 states and 18714 transitions. [2020-10-13 09:40:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 09:40:22,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:22,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:40:22,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 09:40:22,066 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2060063365, now seen corresponding path program 1 times [2020-10-13 09:40:22,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:22,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741000156] [2020-10-13 09:40:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:22,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:22,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:26,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:27,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:27,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 09:40:27,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 09:40:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 09:40:27,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:40:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-13 09:40:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 09:40:27,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:40:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:27,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:27,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:27,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:27,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:27,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:40:27,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:27,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:27,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:27,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:27,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:27,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:27,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 09:40:27,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:27,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 09:40:27,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:27,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:27,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:27,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:27,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-13 09:40:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:27,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:27,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:27,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:40:27,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:27,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 09:40:27,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:40:27,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-13 09:40:27,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741000156] [2020-10-13 09:40:27,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:40:27,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:40:27,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168331615] [2020-10-13 09:40:27,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:27,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:27,680 INFO L87 Difference]: Start difference. First operand 15104 states and 18714 transitions. Second operand 5 states. [2020-10-13 09:40:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:40:43,166 INFO L93 Difference]: Finished difference Result 30254 states and 37587 transitions. [2020-10-13 09:40:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:40:43,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2020-10-13 09:40:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:40:43,231 INFO L225 Difference]: With dead ends: 30254 [2020-10-13 09:40:43,232 INFO L226 Difference]: Without dead ends: 15108 [2020-10-13 09:40:43,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:40:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2020-10-13 09:40:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 15104. [2020-10-13 09:40:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15104 states. [2020-10-13 09:40:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15104 states to 15104 states and 18703 transitions. [2020-10-13 09:40:43,593 INFO L78 Accepts]: Start accepts. Automaton has 15104 states and 18703 transitions. Word has length 195 [2020-10-13 09:40:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:40:43,594 INFO L479 AbstractCegarLoop]: Abstraction has 15104 states and 18703 transitions. [2020-10-13 09:40:43,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:40:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 15104 states and 18703 transitions. [2020-10-13 09:40:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-13 09:40:43,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:40:43,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:40:43,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 09:40:43,614 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:40:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:40:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1361557630, now seen corresponding path program 1 times [2020-10-13 09:40:43,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:40:43,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561039146] [2020-10-13 09:40:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:40:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:43,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:43,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:44,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:45,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:45,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:48,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:48,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-13 09:40:48,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 09:40:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 09:40:48,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:40:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 202 [2020-10-13 09:40:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 09:40:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:40:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:48,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:48,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:48,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:40:48,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:48,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:40:48,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:48,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:48,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:48,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:40:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:49,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:49,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 09:40:49,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:49,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 09:40:49,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:40:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:40:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:40:49,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-13 09:40:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:40:49,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:40:49,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:40:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 09:40:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:40:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-13 09:40:49,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:40:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:40:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:40:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 09:40:49,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:40:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-13 09:40:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561039146] [2020-10-13 09:40:49,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:40:49,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:40:49,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131483438] [2020-10-13 09:40:49,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:40:49,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:40:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:40:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:40:49,377 INFO L87 Difference]: Start difference. First operand 15104 states and 18703 transitions. Second operand 5 states. [2020-10-13 09:41:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:41:05,978 INFO L93 Difference]: Finished difference Result 30230 states and 37492 transitions. [2020-10-13 09:41:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:41:05,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2020-10-13 09:41:05,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:41:06,045 INFO L225 Difference]: With dead ends: 30230 [2020-10-13 09:41:06,046 INFO L226 Difference]: Without dead ends: 15108 [2020-10-13 09:41:06,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:41:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2020-10-13 09:41:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 15104. [2020-10-13 09:41:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15104 states. [2020-10-13 09:41:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15104 states to 15104 states and 18701 transitions. [2020-10-13 09:41:06,428 INFO L78 Accepts]: Start accepts. Automaton has 15104 states and 18701 transitions. Word has length 236 [2020-10-13 09:41:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:41:06,428 INFO L479 AbstractCegarLoop]: Abstraction has 15104 states and 18701 transitions. [2020-10-13 09:41:06,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:41:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 15104 states and 18701 transitions. [2020-10-13 09:41:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 09:41:06,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:41:06,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:41:06,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 09:41:06,439 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:41:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:41:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1642249006, now seen corresponding path program 1 times [2020-10-13 09:41:06,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:41:06,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944935] [2020-10-13 09:41:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:41:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:06,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:06,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:06,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:07,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:07,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:09,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:11,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:11,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-13 09:41:11,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 09:41:11,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 09:41:11,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 09:41:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-10-13 09:41:11,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 09:41:11,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:11,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:41:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:11,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:11,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:11,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:11,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:11,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:41:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:41:11,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:11,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:41:11,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:11,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-13 09:41:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:11,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:11,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:41:11,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 09:41:11,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:41:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 09:41:11,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944935] [2020-10-13 09:41:11,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:41:11,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:41:11,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47889323] [2020-10-13 09:41:11,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:41:11,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:41:11,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:41:11,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:41:11,961 INFO L87 Difference]: Start difference. First operand 15104 states and 18701 transitions. Second operand 6 states. [2020-10-13 09:41:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:41:40,583 INFO L93 Difference]: Finished difference Result 33371 states and 42297 transitions. [2020-10-13 09:41:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:41:40,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 243 [2020-10-13 09:41:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:41:40,655 INFO L225 Difference]: With dead ends: 33371 [2020-10-13 09:41:40,656 INFO L226 Difference]: Without dead ends: 18168 [2020-10-13 09:41:40,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:41:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18168 states. [2020-10-13 09:41:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18168 to 17293. [2020-10-13 09:41:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17293 states. [2020-10-13 09:41:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17293 states to 17293 states and 21007 transitions. [2020-10-13 09:41:41,137 INFO L78 Accepts]: Start accepts. Automaton has 17293 states and 21007 transitions. Word has length 243 [2020-10-13 09:41:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:41:41,138 INFO L479 AbstractCegarLoop]: Abstraction has 17293 states and 21007 transitions. [2020-10-13 09:41:41,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:41:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 17293 states and 21007 transitions. [2020-10-13 09:41:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-13 09:41:41,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:41:41,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:41:41,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 09:41:41,154 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:41:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:41:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 82751314, now seen corresponding path program 1 times [2020-10-13 09:41:41,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:41:41,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108343020] [2020-10-13 09:41:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:41:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:41:41,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:41,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:41,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:41,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:41:44,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking...