/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:43:35,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:43:35,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:43:35,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:43:35,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:43:35,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:43:35,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:43:35,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:43:35,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:43:35,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:43:35,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:43:35,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:43:35,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:43:35,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:43:35,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:43:35,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:43:35,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:43:35,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:43:35,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:43:35,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:43:35,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:43:35,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:43:35,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:43:35,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:43:35,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:43:35,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:43:35,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:43:35,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:43:35,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:43:35,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:43:35,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:43:35,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:43:35,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:43:35,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:43:35,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:43:35,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:43:35,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:43:35,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:43:35,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:43:35,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:43:35,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:43:35,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:43:35,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:43:35,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:43:35,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:43:35,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:43:35,578 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:43:35,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:43:35,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:43:35,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:43:35,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:43:35,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:43:35,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:43:35,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:43:35,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:43:35,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:43:35,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:43:35,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:43:35,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:43:35,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:43:35,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:43:35,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:43:35,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:43:35,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:43:35,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:43:35,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:43:35,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:43:35,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:43:35,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:43:35,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:43:35,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:43:35,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:43:35,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:43:35,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:43:35,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:43:35,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:43:35,924 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:43:35,925 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-12 15:43:35,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/220225b1a/77f68706d84649119e2e2bd8d45e4d5c/FLAG96ec8899e [2020-10-12 15:43:36,426 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:43:36,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-1.c [2020-10-12 15:43:36,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/220225b1a/77f68706d84649119e2e2bd8d45e4d5c/FLAG96ec8899e [2020-10-12 15:43:36,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/220225b1a/77f68706d84649119e2e2bd8d45e4d5c [2020-10-12 15:43:36,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:43:36,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:43:36,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:43:36,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:43:36,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:43:36,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:43:36" (1/1) ... [2020-10-12 15:43:36,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176fd554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:36, skipping insertion in model container [2020-10-12 15:43:36,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:43:36" (1/1) ... [2020-10-12 15:43:36,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:43:36,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:43:37,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:43:37,039 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:43:37,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:43:37,076 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:43:37,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37 WrapperNode [2020-10-12 15:43:37,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:43:37,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:43:37,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:43:37,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:43:37,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... [2020-10-12 15:43:37,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:43:37,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:43:37,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:43:37,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:43:37,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:43:37,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:43:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:43:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-12 15:43:37,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 15:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:43:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:43:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:43:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:43:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:43:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:43:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:43:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:43:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:43:37,524 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:43:37,525 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:43:37,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:43:37 BoogieIcfgContainer [2020-10-12 15:43:37,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:43:37,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:43:37,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:43:37,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:43:37,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:43:36" (1/3) ... [2020-10-12 15:43:37,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4795ae32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:43:37, skipping insertion in model container [2020-10-12 15:43:37,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:43:37" (2/3) ... [2020-10-12 15:43:37,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4795ae32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:43:37, skipping insertion in model container [2020-10-12 15:43:37,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:43:37" (3/3) ... [2020-10-12 15:43:37,538 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-12 15:43:37,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:43:37,555 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:43:37,569 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:43:37,593 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:43:37,594 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:43:37,594 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:43:37,594 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:43:37,594 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:43:37,594 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:43:37,594 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:43:37,595 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:43:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 15:43:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:43:37,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:37,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:37,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-10-12 15:43:37,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:37,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227903651] [2020-10-12 15:43:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:37,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:37,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:37,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 15:43:37,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:37,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-12 15:43:37,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:37,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:37,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:43:37,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:37,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:43:38,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:38,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:38,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:38,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:38,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:43:38,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:38,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:38,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:38,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:38,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:38,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-12 15:43:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:38,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:38,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:38,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:43:38,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:38,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:43:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:38,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227903651] [2020-10-12 15:43:38,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:38,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 15:43:38,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344251610] [2020-10-12 15:43:38,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 15:43:38,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:38,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 15:43:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 15:43:38,080 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-12 15:43:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:38,167 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-12 15:43:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 15:43:38,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-12 15:43:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:38,179 INFO L225 Difference]: With dead ends: 42 [2020-10-12 15:43:38,179 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 15:43:38,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 15:43:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 15:43:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 15:43:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 15:43:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-12 15:43:38,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-12 15:43:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:38,222 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-12 15:43:38,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 15:43:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-12 15:43:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:43:38,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:38,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:43:38,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-10-12 15:43:38,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:38,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806539758] [2020-10-12 15:43:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:38,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:38,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:43:38,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:38,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-12 15:43:38,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:43:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:43:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:38,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:38,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:38,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:38,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:38,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:43:38,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:38,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:38,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:38,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 15:43:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:38,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:38,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:38,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:38,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:38,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:38,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:38,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:38,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:38,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:38,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806539758] [2020-10-12 15:43:38,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:38,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:43:38,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230586486] [2020-10-12 15:43:38,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:43:38,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:43:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:43:38,760 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-12 15:43:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:38,851 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-10-12 15:43:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:43:38,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 15:43:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:38,853 INFO L225 Difference]: With dead ends: 30 [2020-10-12 15:43:38,853 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 15:43:38,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:43:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 15:43:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 15:43:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 15:43:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-12 15:43:38,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-12 15:43:38,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:38,861 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-12 15:43:38,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:43:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-12 15:43:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:43:38,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:38,862 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:38,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:43:38,863 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2046677126, now seen corresponding path program 1 times [2020-10-12 15:43:38,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:38,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256114011] [2020-10-12 15:43:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:38,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:38,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:43:39,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:39,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-12 15:43:39,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:39,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:39,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:43:39,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:39,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:39,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 15:43:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:39,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:39,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256114011] [2020-10-12 15:43:39,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:39,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:43:39,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186002651] [2020-10-12 15:43:39,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:43:39,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:43:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:43:39,282 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-12 15:43:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:39,409 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-12 15:43:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:43:39,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-12 15:43:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:39,411 INFO L225 Difference]: With dead ends: 32 [2020-10-12 15:43:39,411 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 15:43:39,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:43:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 15:43:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 15:43:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 15:43:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-12 15:43:39,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-10-12 15:43:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:39,424 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-12 15:43:39,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:43:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-12 15:43:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:43:39,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:39,426 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:39,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:43:39,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash -98862975, now seen corresponding path program 2 times [2020-10-12 15:43:39,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:39,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217672089] [2020-10-12 15:43:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:43:39,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-12 15:43:39,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:43:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:43:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:39,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:39,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:39,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 15:43:39,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:39,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:39,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 15:43:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:39,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:39,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:39,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:39,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:39,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:39,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:39,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217672089] [2020-10-12 15:43:39,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:39,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:43:39,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296595144] [2020-10-12 15:43:39,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:43:39,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:43:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:43:39,798 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-12 15:43:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:39,907 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-12 15:43:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:43:39,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 15:43:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:39,909 INFO L225 Difference]: With dead ends: 34 [2020-10-12 15:43:39,909 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 15:43:39,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:43:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 15:43:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 15:43:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 15:43:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-12 15:43:39,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-12 15:43:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:39,915 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-12 15:43:39,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:43:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-12 15:43:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:43:39,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:39,917 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:39,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:43:39,917 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:39,918 INFO L82 PathProgramCache]: Analyzing trace with hash -378597956, now seen corresponding path program 3 times [2020-10-12 15:43:39,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:39,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920920097] [2020-10-12 15:43:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:39,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:40,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:43:40,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-12 15:43:40,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:43:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:43:40,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:40,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:40,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:40,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:40,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:40,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:40,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 15:43:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:40,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:40,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:40,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:40,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:40,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:40,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:40,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920920097] [2020-10-12 15:43:40,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:40,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:43:40,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840042111] [2020-10-12 15:43:40,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:43:40,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:43:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:43:40,284 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-10-12 15:43:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:40,416 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-10-12 15:43:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:43:40,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 15:43:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:40,418 INFO L225 Difference]: With dead ends: 36 [2020-10-12 15:43:40,418 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 15:43:40,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 15:43:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 15:43:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 15:43:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-12 15:43:40,424 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-10-12 15:43:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:40,425 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-12 15:43:40,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:43:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-12 15:43:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 15:43:40,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:40,426 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:40,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:43:40,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1379024951, now seen corresponding path program 4 times [2020-10-12 15:43:40,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:40,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891794676] [2020-10-12 15:43:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:40,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:43:40,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:40,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-12 15:43:40,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:43:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:43:40,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:40,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:40,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:40,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:40,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:40,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:40,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:40,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 15:43:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:40,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:40,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:40,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:40,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:40,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:40,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:40,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891794676] [2020-10-12 15:43:40,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:40,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:43:40,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184251038] [2020-10-12 15:43:40,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:43:40,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:43:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:43:40,815 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 10 states. [2020-10-12 15:43:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:40,972 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-12 15:43:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:43:40,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 15:43:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:40,974 INFO L225 Difference]: With dead ends: 38 [2020-10-12 15:43:40,974 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 15:43:40,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:43:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 15:43:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 15:43:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:43:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-12 15:43:40,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2020-10-12 15:43:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:40,980 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-12 15:43:40,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:43:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-12 15:43:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:43:40,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:40,981 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:40,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:43:40,982 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1762476046, now seen corresponding path program 5 times [2020-10-12 15:43:40,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:40,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833744489] [2020-10-12 15:43:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:40,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:41,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:41,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:43:41,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:41,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-12 15:43:41,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:43:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:43:41,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:41,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:41,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:41,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:41,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:41,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:41,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:41,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:41,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 15:43:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:41,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:41,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:41,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:41,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:41,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:41,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:41,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833744489] [2020-10-12 15:43:41,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:41,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:43:41,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863752026] [2020-10-12 15:43:41,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:43:41,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:43:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:43:41,490 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-10-12 15:43:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:41,745 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-12 15:43:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:43:41,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 15:43:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:41,747 INFO L225 Difference]: With dead ends: 40 [2020-10-12 15:43:41,747 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 15:43:41,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:43:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 15:43:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 15:43:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 15:43:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-12 15:43:41,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-10-12 15:43:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:41,755 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-12 15:43:41,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:43:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-12 15:43:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:43:41,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:41,757 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:41,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:43:41,760 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:41,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1382925075, now seen corresponding path program 6 times [2020-10-12 15:43:41,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:41,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804081111] [2020-10-12 15:43:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:42,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:42,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:43:42,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:42,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-12 15:43:42,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:42,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:43:42,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:42,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:43:42,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:42,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:43:42,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:42,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 15:43:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:42,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:42,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:42,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:42,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:42,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:42,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:42,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804081111] [2020-10-12 15:43:42,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:42,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:43:42,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334628079] [2020-10-12 15:43:42,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:43:42,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:43:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:43:42,355 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-12 15:43:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:42,608 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-12 15:43:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:43:42,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 15:43:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:42,610 INFO L225 Difference]: With dead ends: 42 [2020-10-12 15:43:42,610 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 15:43:42,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:43:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 15:43:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 15:43:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 15:43:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-12 15:43:42,618 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2020-10-12 15:43:42,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:42,619 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-12 15:43:42,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:43:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-12 15:43:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:43:42,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:42,621 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:42,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:43:42,622 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1706662104, now seen corresponding path program 7 times [2020-10-12 15:43:42,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:42,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181365416] [2020-10-12 15:43:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:42,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:42,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:43,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:43,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:43:43,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:43,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-12 15:43:43,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:43,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:43:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:43,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:43:43,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:43:43,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:43,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:43,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:43,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:43,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:43,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:43,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:43,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 15:43:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:43,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:43,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:43,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:43,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:43,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:43,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:43,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:43,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:43,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:43,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:43,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181365416] [2020-10-12 15:43:43,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:43,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:43:43,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138884843] [2020-10-12 15:43:43,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:43,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:43,444 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-10-12 15:43:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:43,661 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-12 15:43:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:43:43,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 15:43:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:43,662 INFO L225 Difference]: With dead ends: 44 [2020-10-12 15:43:43,662 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 15:43:43,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:43:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 15:43:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 15:43:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 15:43:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-12 15:43:43,668 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-10-12 15:43:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:43,668 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-12 15:43:43,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-12 15:43:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:43:43,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:43,670 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:43,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:43:43,670 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash 714665635, now seen corresponding path program 8 times [2020-10-12 15:43:43,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:43,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569111995] [2020-10-12 15:43:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:44,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:44,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:43:44,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-12 15:43:44,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:43:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:43:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:44,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:44,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:44,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:44,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:44,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:44,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:44,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:44,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 15:43:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:44,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:44,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:44,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:44,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:44,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:44,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569111995] [2020-10-12 15:43:44,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:44,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:43:44,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310227011] [2020-10-12 15:43:44,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:43:44,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:44,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:43:44,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:43:44,304 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-10-12 15:43:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:44,558 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-12 15:43:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:43:44,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 15:43:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:44,559 INFO L225 Difference]: With dead ends: 46 [2020-10-12 15:43:44,559 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 15:43:44,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:43:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 15:43:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 15:43:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:43:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-12 15:43:44,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2020-10-12 15:43:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:44,565 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-12 15:43:44,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:43:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-12 15:43:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:43:44,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:44,567 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:44,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:43:44,567 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash -261651618, now seen corresponding path program 9 times [2020-10-12 15:43:44,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:44,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78722178] [2020-10-12 15:43:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:44,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:43:45,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:43:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 15:43:45,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:43:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:43:45,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:43:45,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:45,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:45,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 15:43:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:45,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:45,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:43:45,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78722178] [2020-10-12 15:43:45,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:45,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:43:45,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622125470] [2020-10-12 15:43:45,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:43:45,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:45,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:43:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:43:45,337 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-10-12 15:43:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:45,626 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-10-12 15:43:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:43:45,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 15:43:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:45,628 INFO L225 Difference]: With dead ends: 48 [2020-10-12 15:43:45,628 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 15:43:45,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:43:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 15:43:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 15:43:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:43:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-12 15:43:45,634 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-12 15:43:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:45,634 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-12 15:43:45,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:43:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-12 15:43:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:43:45,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:45,636 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:45,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:43:45,636 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2095306073, now seen corresponding path program 10 times [2020-10-12 15:43:45,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:45,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688047616] [2020-10-12 15:43:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:43:45,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-12 15:43:45,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:43:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:43:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:45,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:45,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 15:43:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:45,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:45,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:45,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688047616] [2020-10-12 15:43:45,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:43:45,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:43:45,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911871974] [2020-10-12 15:43:45,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:43:45,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:43:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:43:45,728 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 4 states. [2020-10-12 15:43:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:45,773 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-12 15:43:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 15:43:45,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-12 15:43:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:45,774 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:43:45,774 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:43:45,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:43:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:43:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 15:43:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:43:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-12 15:43:45,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-12 15:43:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:45,783 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-12 15:43:45,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:43:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-12 15:43:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:43:45,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:45,785 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:45,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:43:45,785 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash -900956101, now seen corresponding path program 1 times [2020-10-12 15:43:45,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:45,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579921775] [2020-10-12 15:43:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:43:45,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-12 15:43:45,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 15:43:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 15:43:45,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:43:45,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:45,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 15:43:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:45,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:45,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:45,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:45,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579921775] [2020-10-12 15:43:45,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:45,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 15:43:45,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522674900] [2020-10-12 15:43:45,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:43:45,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:43:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:43:45,983 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 5 states. [2020-10-12 15:43:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:46,033 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-12 15:43:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:43:46,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-12 15:43:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:46,035 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:43:46,037 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 15:43:46,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:43:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 15:43:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 15:43:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 15:43:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-12 15:43:46,048 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-12 15:43:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:46,048 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-12 15:43:46,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:43:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-12 15:43:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:43:46,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:46,049 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:46,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:43:46,050 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1614150301, now seen corresponding path program 2 times [2020-10-12 15:43:46,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:46,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796353229] [2020-10-12 15:43:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:43:46,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-12 15:43:46,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:43:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:46,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:43:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:46,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:46,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:46,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:46,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 15:43:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:46,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:46,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:46,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:46,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796353229] [2020-10-12 15:43:46,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:46,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:43:46,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630903639] [2020-10-12 15:43:46,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:43:46,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:43:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:43:46,244 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 6 states. [2020-10-12 15:43:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:46,295 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-12 15:43:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:43:46,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-12 15:43:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:46,296 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:43:46,297 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 15:43:46,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:43:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 15:43:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 15:43:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 15:43:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-12 15:43:46,304 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-12 15:43:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:46,304 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-12 15:43:46,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:43:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-12 15:43:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:43:46,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:46,305 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:46,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:43:46,306 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash 564814975, now seen corresponding path program 3 times [2020-10-12 15:43:46,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:46,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299402065] [2020-10-12 15:43:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:43:46,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-12 15:43:46,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:43:46,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:46,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:43:46,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:46,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:46,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:46,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:46,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:46,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:46,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:46,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 15:43:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:46,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:46,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:46,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:46,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:46,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299402065] [2020-10-12 15:43:46,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:46,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:43:46,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978242954] [2020-10-12 15:43:46,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:43:46,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:43:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:43:46,612 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-10-12 15:43:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:46,675 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-12 15:43:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:43:46,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-12 15:43:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:46,676 INFO L225 Difference]: With dead ends: 80 [2020-10-12 15:43:46,677 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 15:43:46,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:43:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 15:43:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 15:43:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:43:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-12 15:43:46,684 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-12 15:43:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:46,685 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-12 15:43:46,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:43:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-12 15:43:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:43:46,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:46,685 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:46,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:43:46,686 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1470881249, now seen corresponding path program 4 times [2020-10-12 15:43:46,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:46,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583776717] [2020-10-12 15:43:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:46,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:46,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:43:46,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-12 15:43:46,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:43:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:43:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:47,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:47,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:47,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:47,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:47,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:47,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:47,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:47,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 15:43:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:47,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:47,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:47,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:47,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:47,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:47,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:47,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583776717] [2020-10-12 15:43:47,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:47,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:43:47,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342802106] [2020-10-12 15:43:47,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:43:47,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:47,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:43:47,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:43:47,041 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 8 states. [2020-10-12 15:43:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:47,122 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-12 15:43:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:43:47,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-12 15:43:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:47,124 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:43:47,124 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 15:43:47,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:43:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 15:43:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 15:43:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:43:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-12 15:43:47,136 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-12 15:43:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:47,137 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-12 15:43:47,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:43:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-12 15:43:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:43:47,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:47,138 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:47,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:43:47,140 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash 322209475, now seen corresponding path program 5 times [2020-10-12 15:43:47,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:47,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104726678] [2020-10-12 15:43:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:47,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:47,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:43:47,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-12 15:43:47,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:43:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:43:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:47,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:47,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:47,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:47,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:43:47,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:47,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:47,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:47,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:47,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:47,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 15:43:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:47,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:47,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:47,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:47,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:47,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:47,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:47,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:47,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104726678] [2020-10-12 15:43:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:43:47,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188943267] [2020-10-12 15:43:47,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:43:47,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:43:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:43:47,531 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 9 states. [2020-10-12 15:43:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:47,600 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-12 15:43:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:43:47,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-12 15:43:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:47,601 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:43:47,601 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:43:47,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:43:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:43:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 15:43:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:43:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-12 15:43:47,608 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-12 15:43:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:47,609 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-12 15:43:47,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:43:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-12 15:43:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:43:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:47,610 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:47,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:43:47,611 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 255229733, now seen corresponding path program 6 times [2020-10-12 15:43:47,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:47,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292139053] [2020-10-12 15:43:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:47,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:43:48,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-12 15:43:48,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:43:48,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:48,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:43:48,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:48,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:48,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:48,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:48,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:48,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 15:43:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:48,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:48,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:48,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:48,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292139053] [2020-10-12 15:43:48,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:48,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:43:48,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149965616] [2020-10-12 15:43:48,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:43:48,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:48,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:43:48,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:43:48,135 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 10 states. [2020-10-12 15:43:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:48,220 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-12 15:43:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:43:48,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-12 15:43:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:48,222 INFO L225 Difference]: With dead ends: 86 [2020-10-12 15:43:48,222 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:43:48,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:43:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:43:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 15:43:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:43:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-12 15:43:48,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-12 15:43:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:48,235 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-12 15:43:48,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:43:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-12 15:43:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:43:48,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:48,236 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:48,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:43:48,237 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash 312207111, now seen corresponding path program 7 times [2020-10-12 15:43:48,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:48,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148085468] [2020-10-12 15:43:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:43:48,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-12 15:43:48,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:43:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:48,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:43:48,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:48,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:48,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:48,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 15:43:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:48,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:48,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:48,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:48,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:48,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:48,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148085468] [2020-10-12 15:43:48,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:48,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:43:48,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254172602] [2020-10-12 15:43:48,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:43:48,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:43:48,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:43:48,814 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 11 states. [2020-10-12 15:43:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:48,904 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-12 15:43:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:43:48,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-12 15:43:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:48,906 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:43:48,906 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 15:43:48,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:43:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 15:43:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-12 15:43:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:43:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-12 15:43:48,914 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-12 15:43:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:48,914 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-12 15:43:48,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:43:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-12 15:43:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:43:48,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:48,915 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:48,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:43:48,916 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash -767107479, now seen corresponding path program 8 times [2020-10-12 15:43:48,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:48,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497232991] [2020-10-12 15:43:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:48,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:49,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 15:43:49,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-12 15:43:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:43:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:43:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:49,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:49,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:49,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:49,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:49,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:49,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:49,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:49,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:49,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:49,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:49,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 15:43:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:49,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:49,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:49,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:49,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:49,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:49,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:49,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:49,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:49,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:49,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:43:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:49,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497232991] [2020-10-12 15:43:49,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:49,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:43:49,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081705109] [2020-10-12 15:43:49,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:43:49,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:43:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:43:49,666 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 12 states. [2020-10-12 15:43:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:49,764 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-12 15:43:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:43:49,764 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-12 15:43:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:49,765 INFO L225 Difference]: With dead ends: 90 [2020-10-12 15:43:49,765 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:43:49,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:43:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:43:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-12 15:43:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 15:43:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-12 15:43:49,769 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-12 15:43:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:49,770 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-12 15:43:49,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:43:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-12 15:43:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:43:49,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:49,771 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:49,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:43:49,771 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:49,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1393657163, now seen corresponding path program 9 times [2020-10-12 15:43:49,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:49,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34947632] [2020-10-12 15:43:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:50,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:50,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 15:43:50,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:50,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-12 15:43:50,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:50,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:43:50,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:43:50,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:43:50,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:43:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:50,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:50,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:50,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:50,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:50,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:43:50,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:50,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:50,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:43:50,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:50,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:50,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 15:43:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:43:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:43:50,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:43:50,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:43:50,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:43:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:43:50,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:43:50,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:43:50,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:43:50,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:43:50,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:43:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 15:43:50,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34947632] [2020-10-12 15:43:50,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:43:50,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:43:50,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849680504] [2020-10-12 15:43:50,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:43:50,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:43:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:43:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:50,559 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 13 states. [2020-10-12 15:43:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:43:50,653 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-12 15:43:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:43:50,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-12 15:43:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:43:50,655 INFO L225 Difference]: With dead ends: 91 [2020-10-12 15:43:50,655 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:43:50,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:43:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:43:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 15:43:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:43:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-12 15:43:50,659 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-12 15:43:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:43:50,659 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-12 15:43:50,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:43:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-12 15:43:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 15:43:50,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:43:50,660 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:43:50,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:43:50,661 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:43:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:43:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash -875693139, now seen corresponding path program 10 times [2020-10-12 15:43:50,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:43:50,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429886508] [2020-10-12 15:43:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:43:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:43:50,697 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:43:50,698 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:43:50,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:43:50,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:43:50 BoogieIcfgContainer [2020-10-12 15:43:50,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:43:50,726 INFO L168 Benchmark]: Toolchain (without parser) took 13942.97 ms. Allocated memory was 137.4 MB in the beginning and 427.8 MB in the end (delta: 290.5 MB). Free memory was 100.0 MB in the beginning and 315.5 MB in the end (delta: -215.4 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:50,727 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 15:43:50,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.40 ms. Allocated memory is still 137.4 MB. Free memory was 99.8 MB in the beginning and 89.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:50,728 INFO L168 Benchmark]: Boogie Preprocessor took 117.28 ms. Allocated memory was 137.4 MB in the beginning and 198.7 MB in the end (delta: 61.3 MB). Free memory was 89.2 MB in the beginning and 175.8 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:50,729 INFO L168 Benchmark]: RCFGBuilder took 334.48 ms. Allocated memory is still 198.7 MB. Free memory was 175.8 MB in the beginning and 157.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:50,729 INFO L168 Benchmark]: TraceAbstraction took 13193.60 ms. Allocated memory was 198.7 MB in the beginning and 427.8 MB in the end (delta: 229.1 MB). Free memory was 157.1 MB in the beginning and 315.5 MB in the end (delta: -158.3 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-10-12 15:43:50,732 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.40 ms. Allocated memory is still 137.4 MB. Free memory was 99.8 MB in the beginning and 89.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.28 ms. Allocated memory was 137.4 MB in the beginning and 198.7 MB in the end (delta: 61.3 MB). Free memory was 89.2 MB in the beginning and 175.8 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.48 ms. Allocated memory is still 198.7 MB. Free memory was 175.8 MB in the beginning and 157.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13193.60 ms. Allocated memory was 198.7 MB in the beginning and 427.8 MB in the end (delta: 229.1 MB). Free memory was 157.1 MB in the beginning and 315.5 MB in the end (delta: -158.3 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] struct cont cont; [L20] struct dummy array[10]; [L21] int i, *pa; [L22] i = __VERIFIER_nondet_int() [L24] int j = 0; [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND FALSE !(j < 10) [L29] COND TRUE i >= 0 && i < 9 [L30] cont.array = &array[i] [L31] EXPR cont.array [L31] pa = &cont.array[0].b [L32] EXPR cont.array [L32] EXPR cont.array[0].b [L32] COND TRUE cont.array[0].b > 0 [L33] EXPR array[i].b [L33] i = array[i].b - 10 [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND FALSE !(i < *pa) [L37] CALL, EXPR check(&cont, i) [L14] EXPR pc->array [L14] EXPR pc->array[1].b [L14] return pc->array[1].b == i; [L37] RET, EXPR check(&cont, i) [L37] COND TRUE !check(&cont, i) [L45] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.1s, OverallIterations: 22, TraceHistogramMax: 11, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 356 SDtfs, 152 SDslu, 1452 SDs, 0 SdLazy, 1304 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 73332 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 1100/1715 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...