/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:59:23,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:59:23,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:59:23,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:59:23,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:59:23,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:59:23,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:59:23,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:59:23,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:59:23,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:59:23,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:59:23,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:59:23,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:59:23,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:59:23,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:59:23,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:59:23,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:59:23,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:59:23,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:59:23,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:59:23,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:59:23,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:59:23,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:59:23,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:59:23,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:59:23,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:59:23,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:59:23,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:59:23,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:59:23,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:59:23,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:59:23,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:59:23,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:59:23,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:59:23,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:59:23,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:59:23,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:59:23,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:59:23,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:59:23,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:59:23,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:59:23,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:59:23,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:59:23,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:59:23,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:59:23,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:59:23,693 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:59:23,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:59:23,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:59:23,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:59:23,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:59:23,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:59:23,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:59:23,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:59:23,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:59:23,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:59:23,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:59:23,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:59:23,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:59:23,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:59:23,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:59:23,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:59:23,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:59:23,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:23,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:59:23,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:59:23,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:59:23,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:59:23,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:59:23,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:59:23,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:59:23,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:59:23,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:59:24,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:59:24,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:59:24,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:59:24,007 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:59:24,008 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-13 10:59:24,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e103b7a99/e20a8ec4065f4273ad5eceaade968350/FLAG30807a4c8 [2020-10-13 10:59:24,503 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:59:24,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-13 10:59:24,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e103b7a99/e20a8ec4065f4273ad5eceaade968350/FLAG30807a4c8 [2020-10-13 10:59:24,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e103b7a99/e20a8ec4065f4273ad5eceaade968350 [2020-10-13 10:59:24,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:59:24,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:59:24,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:24,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:59:24,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:59:24,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:24" (1/1) ... [2020-10-13 10:59:24,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177c5926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:24, skipping insertion in model container [2020-10-13 10:59:24,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:24" (1/1) ... [2020-10-13 10:59:24,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:59:24,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:59:25,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:25,186 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:59:25,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:25,214 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:59:25,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25 WrapperNode [2020-10-13 10:59:25,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:25,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:59:25,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:59:25,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:59:25,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... [2020-10-13 10:59:25,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:59:25,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:59:25,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:59:25,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:59:25,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:59:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:59:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:59:25,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:59:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:59:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:59:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:59:25,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:59:25,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:59:25,552 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:59:25,552 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:59:25,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:25 BoogieIcfgContainer [2020-10-13 10:59:25,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:59:25,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:59:25,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:59:25,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:59:25,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:24" (1/3) ... [2020-10-13 10:59:25,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7599f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:25, skipping insertion in model container [2020-10-13 10:59:25,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:25" (2/3) ... [2020-10-13 10:59:25,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7599f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:25, skipping insertion in model container [2020-10-13 10:59:25,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:25" (3/3) ... [2020-10-13 10:59:25,565 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2020-10-13 10:59:25,573 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:59:25,580 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:59:25,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:59:25,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:59:25,614 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:59:25,614 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:59:25,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:59:25,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:59:25,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:59:25,614 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:59:25,614 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:59:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:59:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:25,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:25,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:25,636 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-10-13 10:59:25,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:25,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802494963] [2020-10-13 10:59:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:25,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:25,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:25,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:25,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:25,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:59:25,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:59:25,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:25,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:59:25,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:25,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:25,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:25,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:25,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:59:25,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:25,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:25,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:25,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802494963] [2020-10-13 10:59:25,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:25,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:59:25,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929782929] [2020-10-13 10:59:25,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:59:25,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:59:25,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:25,921 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-13 10:59:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:25,943 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-13 10:59:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:59:25,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:59:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:25,953 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:59:25,953 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:59:25,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:59:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:59:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:59:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-13 10:59:25,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-13 10:59:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:25,995 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-13 10:59:25,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:59:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-13 10:59:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:25,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:25,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:25,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:59:25,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-10-13 10:59:25,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:25,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377719924] [2020-10-13 10:59:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:26,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:26,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 10:59:26,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:26,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:26,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:26,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:26,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:26,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:26,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:26,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:26,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377719924] [2020-10-13 10:59:26,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:26,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:26,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079821121] [2020-10-13 10:59:26,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:26,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:26,133 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-13 10:59:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:26,158 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-13 10:59:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:26,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:59:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:26,160 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:26,160 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:59:26,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:59:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:59:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:59:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:59:26,166 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:59:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:26,167 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:59:26,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:59:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:59:26,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:26,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:26,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:59:26,169 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:26,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2020-10-13 10:59:26,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:26,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991049689] [2020-10-13 10:59:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:59:26,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:26,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 10:59:26,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:26,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:59:26,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:26,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:26,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:26,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:26,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:26,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:26,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:26,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:26,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:26,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991049689] [2020-10-13 10:59:26,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:26,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:26,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799197599] [2020-10-13 10:59:26,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:26,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:26,360 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:59:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:26,381 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:59:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:26,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:59:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:26,383 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:26,383 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:59:26,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:59:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:59:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:59:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:59:26,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-13 10:59:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:26,389 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:59:26,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:59:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:59:26,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:26,390 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:26,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:59:26,390 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2011681711, now seen corresponding path program 1 times [2020-10-13 10:59:26,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:26,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536761706] [2020-10-13 10:59:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:59:26,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:26,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-13 10:59:26,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:26,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:59:26,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:59:26,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:59:26,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:26,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:26,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:26,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:26,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536761706] [2020-10-13 10:59:26,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:26,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:26,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998542220] [2020-10-13 10:59:26,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:26,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:26,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:26,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:26,613 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:59:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:26,642 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-13 10:59:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:26,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:59:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:26,646 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:59:26,646 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:59:26,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:59:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:59:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:59:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 10:59:26,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-13 10:59:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:26,653 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 10:59:26,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 10:59:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:59:26,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:26,655 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:26,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:59:26,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1593878762, now seen corresponding path program 2 times [2020-10-13 10:59:26,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:26,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945197805] [2020-10-13 10:59:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:59:26,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:59:26,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:59:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:26,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:26,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:26,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:26,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:26,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:26,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:26,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:59:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:59:26,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945197805] [2020-10-13 10:59:26,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:26,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:26,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337862703] [2020-10-13 10:59:26,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:26,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:26,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:26,860 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-13 10:59:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:26,918 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:59:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:26,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:59:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:26,921 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:59:26,922 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:59:26,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:59:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 10:59:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:59:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:59:26,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-13 10:59:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:26,937 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:59:26,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:59:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:59:26,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:26,938 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:26,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:59:26,939 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash -89769689, now seen corresponding path program 3 times [2020-10-13 10:59:26,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:26,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775631031] [2020-10-13 10:59:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:26,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:26,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:59:27,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:27,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 10:59:27,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:27,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:59:27,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:59:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:27,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:27,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:59:27,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:27,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:27,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:59:27,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775631031] [2020-10-13 10:59:27,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:27,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:59:27,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115983150] [2020-10-13 10:59:27,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:59:27,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:27,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:59:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:27,106 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-13 10:59:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:27,167 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-13 10:59:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:59:27,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 10:59:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:27,172 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:59:27,172 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:59:27,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:59:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 10:59:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:59:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 10:59:27,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2020-10-13 10:59:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:27,186 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 10:59:27,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:59:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 10:59:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:59:27,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:27,190 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:27,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:59:27,190 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash 733712482, now seen corresponding path program 4 times [2020-10-13 10:59:27,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:27,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823770450] [2020-10-13 10:59:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:59:27,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 10:59:27,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:27,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:27,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:59:27,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:27,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:27,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:27,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:27,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:27,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:59:27,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823770450] [2020-10-13 10:59:27,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:27,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:59:27,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781923541] [2020-10-13 10:59:27,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:59:27,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:59:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:27,523 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-13 10:59:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:27,559 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 10:59:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:59:27,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 10:59:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:27,562 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:59:27,562 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:59:27,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:59:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:59:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:59:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 10:59:27,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2020-10-13 10:59:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:27,572 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 10:59:27,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:59:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 10:59:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:59:27,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:27,573 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:27,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:59:27,574 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:27,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1567930911, now seen corresponding path program 5 times [2020-10-13 10:59:27,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:27,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769415675] [2020-10-13 10:59:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:59:27,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:27,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 10:59:27,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:59:27,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:59:27,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:59:27,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:27,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:27,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:27,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:59:27,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769415675] [2020-10-13 10:59:27,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:27,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:59:27,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512622078] [2020-10-13 10:59:27,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:59:27,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:59:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:27,779 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-13 10:59:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:27,816 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-13 10:59:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:59:27,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:59:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:27,818 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:59:27,818 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:59:27,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:59:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 10:59:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:59:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 10:59:27,825 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2020-10-13 10:59:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:27,825 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 10:59:27,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:59:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 10:59:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:59:27,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:27,827 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:27,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:59:27,827 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash 351122266, now seen corresponding path program 6 times [2020-10-13 10:59:27,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:27,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753037333] [2020-10-13 10:59:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:27,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:27,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:28,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:59:28,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:28,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 10:59:28,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:59:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:59:28,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:28,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:28,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:28,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:28,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:28,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:59:28,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753037333] [2020-10-13 10:59:28,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:28,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:59:28,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908158045] [2020-10-13 10:59:28,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:59:28,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:59:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:28,053 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-13 10:59:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:28,082 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-13 10:59:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:59:28,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:59:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:28,083 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:59:28,083 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:59:28,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:59:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:59:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:59:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 10:59:28,089 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2020-10-13 10:59:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:28,090 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 10:59:28,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:59:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 10:59:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:59:28,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:28,091 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:28,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:59:28,091 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:28,091 INFO L82 PathProgramCache]: Analyzing trace with hash 240236183, now seen corresponding path program 7 times [2020-10-13 10:59:28,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:28,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699122087] [2020-10-13 10:59:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:28,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:28,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:59:28,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-13 10:59:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:59:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:59:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:59:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:28,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:28,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:28,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:28,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:28,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:28,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:28,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:28,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:28,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:59:28,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699122087] [2020-10-13 10:59:28,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:28,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:59:28,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638796556] [2020-10-13 10:59:28,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:59:28,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:59:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:28,366 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-10-13 10:59:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:28,408 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-13 10:59:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:59:28,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 10:59:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:28,409 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:59:28,409 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:59:28,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:59:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 10:59:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:59:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 10:59:28,415 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2020-10-13 10:59:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:28,415 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 10:59:28,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:59:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 10:59:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:59:28,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:28,416 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:28,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:59:28,417 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash 41775570, now seen corresponding path program 8 times [2020-10-13 10:59:28,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:28,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337937053] [2020-10-13 10:59:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:28,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:28,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:59:28,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:28,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-13 10:59:28,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:59:28,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:28,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:59:28,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:28,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:28,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:28,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:28,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:28,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:28,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:28,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:28,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:28,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:59:28,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337937053] [2020-10-13 10:59:28,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:28,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:59:28,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367883928] [2020-10-13 10:59:28,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:59:28,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:59:28,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:28,790 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-10-13 10:59:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:28,829 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-13 10:59:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:59:28,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:59:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:28,831 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:59:28,831 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:59:28,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:59:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:59:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:59:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-13 10:59:28,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-10-13 10:59:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:28,837 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-13 10:59:28,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:59:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-13 10:59:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:59:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:28,839 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:28,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:59:28,839 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -679244145, now seen corresponding path program 9 times [2020-10-13 10:59:28,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:28,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592359163] [2020-10-13 10:59:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:28,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:29,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:59:29,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-13 10:59:29,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:59:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:59:29,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:59:29,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:29,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:29,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:29,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:29,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:29,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 10:59:29,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592359163] [2020-10-13 10:59:29,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:29,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:59:29,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378662439] [2020-10-13 10:59:29,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:59:29,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:29,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:59:29,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:29,300 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-10-13 10:59:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:29,343 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 10:59:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:59:29,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:59:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:29,344 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:59:29,344 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:59:29,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:59:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 10:59:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:59:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 10:59:29,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2020-10-13 10:59:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:29,350 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 10:59:29,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:59:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 10:59:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:59:29,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:29,351 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:29,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:59:29,351 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1184443338, now seen corresponding path program 10 times [2020-10-13 10:59:29,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:29,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196573896] [2020-10-13 10:59:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:29,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:29,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:59:29,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:29,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-13 10:59:29,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:29,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:59:29,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:29,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:59:29,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:29,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:29,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:29,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:29,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:29,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:29,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:29,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:29,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:29,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 10:59:29,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196573896] [2020-10-13 10:59:29,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:29,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:59:29,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459378110] [2020-10-13 10:59:29,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:59:29,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:59:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:29,935 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-13 10:59:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:29,971 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-13 10:59:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:59:29,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:59:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:29,973 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:59:29,974 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:59:29,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:59:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:59:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:59:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:59:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 10:59:29,980 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2020-10-13 10:59:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:29,980 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 10:59:29,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:59:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 10:59:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:59:29,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:29,982 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:29,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:59:29,982 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1114070521, now seen corresponding path program 11 times [2020-10-13 10:59:29,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:29,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887119598] [2020-10-13 10:59:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:30,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:30,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:30,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:59:30,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:30,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-13 10:59:30,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:30,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:59:30,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:59:30,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:59:30,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:30,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:30,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:30,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:30,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:30,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:30,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:30,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:30,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:30,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:59:30,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887119598] [2020-10-13 10:59:30,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:30,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:59:30,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771860925] [2020-10-13 10:59:30,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:59:30,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:30,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:59:30,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:30,598 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2020-10-13 10:59:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:30,647 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-13 10:59:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:59:30,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 10:59:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:30,648 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:59:30,648 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:59:30,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:59:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 10:59:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:59:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-13 10:59:30,653 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2020-10-13 10:59:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:30,654 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-13 10:59:30,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:59:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-13 10:59:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:59:30,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:30,655 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:30,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:59:30,655 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:30,656 INFO L82 PathProgramCache]: Analyzing trace with hash -71876286, now seen corresponding path program 12 times [2020-10-13 10:59:30,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:30,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287413946] [2020-10-13 10:59:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:30,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:30,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:31,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:31,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:59:31,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:31,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-13 10:59:31,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:59:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:59:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:31,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:31,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:31,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:31,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:31,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:31,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:59:31,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287413946] [2020-10-13 10:59:31,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:31,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:59:31,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567951546] [2020-10-13 10:59:31,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:59:31,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:59:31,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:31,599 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 9 states. [2020-10-13 10:59:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:31,635 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2020-10-13 10:59:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:59:31,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:59:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:31,637 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:59:31,637 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:59:31,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:59:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:59:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:59:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:59:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-13 10:59:31,642 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2020-10-13 10:59:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:31,643 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-13 10:59:31,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:59:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-13 10:59:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:59:31,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:31,644 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:31,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:59:31,644 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1567052031, now seen corresponding path program 13 times [2020-10-13 10:59:31,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:31,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968643443] [2020-10-13 10:59:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:31,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:31,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:32,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:32,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:32,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:59:32,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:32,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-13 10:59:32,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:32,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:59:32,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:59:32,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:59:32,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:32,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:32,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:32,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:32,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:32,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:32,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:59:32,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968643443] [2020-10-13 10:59:32,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:32,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:59:32,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078428413] [2020-10-13 10:59:32,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:59:32,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:59:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:59:32,564 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-10-13 10:59:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:32,617 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-13 10:59:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:59:32,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 10:59:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:32,618 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:59:32,618 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:59:32,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:59:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:59:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 10:59:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:59:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 10:59:32,624 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 38 [2020-10-13 10:59:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:32,625 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 10:59:32,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:59:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 10:59:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:59:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:32,626 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:32,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:59:32,626 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -493481414, now seen corresponding path program 14 times [2020-10-13 10:59:32,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:32,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737019451] [2020-10-13 10:59:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:32,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:32,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:33,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:33,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:33,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:59:33,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:33,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-13 10:59:33,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:33,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:59:33,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:33,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:59:33,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:33,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:33,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:33,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:33,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:33,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:33,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:33,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:33,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:33,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:33,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:33,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 10:59:33,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737019451] [2020-10-13 10:59:33,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:33,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:59:33,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105258364] [2020-10-13 10:59:33,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:59:33,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:59:33,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:59:33,552 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-10-13 10:59:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:33,593 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-13 10:59:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:59:33,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 10:59:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:33,594 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:59:33,594 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:59:33,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:59:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:59:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 10:59:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:59:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-13 10:59:33,599 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2020-10-13 10:59:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:33,600 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-13 10:59:33,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:59:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-13 10:59:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:59:33,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:33,601 INFO L422 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:33,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:59:33,601 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash -905053321, now seen corresponding path program 15 times [2020-10-13 10:59:33,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:33,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727624286] [2020-10-13 10:59:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:33,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:34,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:34,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:59:34,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:34,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-13 10:59:34,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:59:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:59:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:59:34,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:34,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:34,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:34,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:34,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:34,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 10:59:34,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727624286] [2020-10-13 10:59:34,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:34,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:59:34,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177942570] [2020-10-13 10:59:34,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:59:34,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:59:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:34,531 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-13 10:59:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:34,588 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-13 10:59:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:59:34,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 10:59:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:34,590 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:59:34,590 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:59:34,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:59:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 10:59:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:59:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-13 10:59:34,595 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 42 [2020-10-13 10:59:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:34,595 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-13 10:59:34,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:59:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-13 10:59:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:59:34,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:34,596 INFO L422 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:34,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:59:34,597 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1069809998, now seen corresponding path program 16 times [2020-10-13 10:59:34,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:34,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130300945] [2020-10-13 10:59:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:34,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:34,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:35,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:35,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:35,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:59:35,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:35,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-13 10:59:35,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:35,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:59:35,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:35,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:59:35,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:35,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:35,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:35,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:35,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:35,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:35,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:35,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:59:35,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130300945] [2020-10-13 10:59:35,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:35,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:59:35,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688274473] [2020-10-13 10:59:35,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:59:35,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:35,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:59:35,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:35,607 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2020-10-13 10:59:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:35,665 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-13 10:59:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:59:35,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 10:59:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:35,667 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:59:35,667 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:59:35,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:59:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:59:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:59:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-13 10:59:35,678 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2020-10-13 10:59:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:35,679 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-13 10:59:35,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:59:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-13 10:59:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:59:35,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:35,681 INFO L422 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:35,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:59:35,682 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -353173137, now seen corresponding path program 17 times [2020-10-13 10:59:35,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:35,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279224670] [2020-10-13 10:59:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:36,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:36,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:36,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:59:36,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-13 10:59:36,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:59:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:59:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:59:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:36,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:36,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:36,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:36,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:36,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:36,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:36,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:36,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:36,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 10:59:36,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279224670] [2020-10-13 10:59:36,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:36,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:59:36,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555380344] [2020-10-13 10:59:36,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:59:36,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:36,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:59:36,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:36,800 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2020-10-13 10:59:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:36,863 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-13 10:59:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:59:36,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 10:59:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:36,864 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:59:36,864 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:59:36,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:59:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 10:59:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:59:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-13 10:59:36,869 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 46 [2020-10-13 10:59:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:36,869 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-13 10:59:36,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:59:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-13 10:59:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:59:36,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:36,873 INFO L422 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:36,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:59:36,873 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1006069418, now seen corresponding path program 18 times [2020-10-13 10:59:36,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:36,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416915395] [2020-10-13 10:59:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:36,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:38,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:59:38,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:38,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-13 10:59:38,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:59:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:38,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:59:38,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:38,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:38,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:38,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:38,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:38,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 10:59:38,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416915395] [2020-10-13 10:59:38,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:38,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:59:38,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758592671] [2020-10-13 10:59:38,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:59:38,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:38,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:59:38,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:38,201 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 12 states. [2020-10-13 10:59:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:38,271 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-13 10:59:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:59:38,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 10:59:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:38,272 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:59:38,272 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 10:59:38,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 10:59:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 10:59:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:59:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-13 10:59:38,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2020-10-13 10:59:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:38,284 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-13 10:59:38,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:59:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-13 10:59:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:59:38,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:38,285 INFO L422 BasicCegarLoop]: trace histogram [20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:38,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:59:38,285 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1506067175, now seen corresponding path program 19 times [2020-10-13 10:59:38,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:38,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315077226] [2020-10-13 10:59:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:38,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:39,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:59:39,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:39,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1039 [2020-10-13 10:59:39,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:59:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 10:59:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:59:39,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:39,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:39,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:39,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:39,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:39,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:39,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:39,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:39,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:39,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:39,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 100 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 10:59:39,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315077226] [2020-10-13 10:59:39,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:39,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:59:39,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080550166] [2020-10-13 10:59:39,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:59:39,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:59:39,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:59:39,443 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 13 states. [2020-10-13 10:59:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:39,505 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-13 10:59:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:59:39,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 10:59:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:39,506 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:59:39,507 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:59:39,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:59:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:59:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:59:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:59:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-13 10:59:39,511 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2020-10-13 10:59:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:39,512 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-13 10:59:39,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:59:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-13 10:59:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:59:39,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:39,513 INFO L422 BasicCegarLoop]: trace histogram [21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:39,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:59:39,513 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1029614114, now seen corresponding path program 20 times [2020-10-13 10:59:39,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:39,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241639588] [2020-10-13 10:59:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:39,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:40,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:40,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:40,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:59:40,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-10-13 10:59:40,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:59:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:59:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:40,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:40,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:40,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:40,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:40,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:40,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:40,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 110 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:59:40,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241639588] [2020-10-13 10:59:40,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:40,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:59:40,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787188468] [2020-10-13 10:59:40,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:59:40,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:59:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:59:40,796 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 13 states. [2020-10-13 10:59:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:40,841 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-10-13 10:59:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:59:40,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 10:59:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:40,842 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:59:40,842 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:59:40,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:59:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:59:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:59:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:59:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-13 10:59:40,848 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 52 [2020-10-13 10:59:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:40,848 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-13 10:59:40,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:59:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-13 10:59:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:59:40,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:40,849 INFO L422 BasicCegarLoop]: trace histogram [22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:40,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:59:40,849 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1065771041, now seen corresponding path program 21 times [2020-10-13 10:59:40,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:40,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726290282] [2020-10-13 10:59:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:40,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:40,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:42,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:42,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:59:42,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:42,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-13 10:59:42,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:59:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 10:59:42,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:59:42,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:42,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:42,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:42,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:42,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:42,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:42,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:42,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:42,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 121 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 10:59:42,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726290282] [2020-10-13 10:59:42,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:42,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:59:42,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479277739] [2020-10-13 10:59:42,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:59:42,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:59:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:59:42,277 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 14 states. [2020-10-13 10:59:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:42,346 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-13 10:59:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:59:42,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 10:59:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:42,347 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:59:42,348 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:59:42,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:59:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:59:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 10:59:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:59:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-13 10:59:42,356 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 54 [2020-10-13 10:59:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:42,357 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-13 10:59:42,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:59:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-13 10:59:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:59:42,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:42,358 INFO L422 BasicCegarLoop]: trace histogram [23, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:42,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:59:42,358 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:42,358 INFO L82 PathProgramCache]: Analyzing trace with hash -900716262, now seen corresponding path program 22 times [2020-10-13 10:59:42,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:42,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607940633] [2020-10-13 10:59:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:42,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:59:43,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:43,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:43,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:43,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:43,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:43,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:43,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:43,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:43,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:43,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:43,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 132 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 10:59:43,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607940633] [2020-10-13 10:59:43,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:43,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:59:43,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505947574] [2020-10-13 10:59:43,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:59:43,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:59:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:59:43,762 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 14 states. [2020-10-13 10:59:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:43,830 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-10-13 10:59:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:59:43,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 10:59:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:43,831 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:59:43,831 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:59:43,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:59:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:59:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 10:59:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:59:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-13 10:59:43,836 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 56 [2020-10-13 10:59:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:43,837 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-13 10:59:43,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:59:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-13 10:59:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:59:43,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:43,841 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:43,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:59:43,841 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1219495849, now seen corresponding path program 23 times [2020-10-13 10:59:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:43,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11923420] [2020-10-13 10:59:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:43,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:45,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 10:59:45,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:59:45,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:45,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:45,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:45,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:45,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:45,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:45,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:45,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:45,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:59:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 144 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 10:59:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11923420] [2020-10-13 10:59:45,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:59:45,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899502646] [2020-10-13 10:59:45,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:59:45,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:59:45,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:59:45,472 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 15 states. [2020-10-13 10:59:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:45,567 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-13 10:59:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:59:45,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-13 10:59:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:45,569 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:59:45,569 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:59:45,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:59:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:59:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 10:59:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:59:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-13 10:59:45,575 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 58 [2020-10-13 10:59:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:45,575 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-13 10:59:45,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:59:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-13 10:59:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:59:45,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:45,577 INFO L422 BasicCegarLoop]: trace histogram [25, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:45,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:59:45,578 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1693598610, now seen corresponding path program 24 times [2020-10-13 10:59:45,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:45,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629309862] [2020-10-13 10:59:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:45,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:47,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:47,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:59:47,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:47,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583 [2020-10-13 10:59:47,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:47,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:59:47,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:47,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:59:47,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:47,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:47,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:47,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:47,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:47,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:47,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:47,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:47,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:59:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 156 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 10:59:47,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629309862] [2020-10-13 10:59:47,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:47,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:59:47,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714205250] [2020-10-13 10:59:47,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:59:47,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:59:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:59:47,330 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 15 states. [2020-10-13 10:59:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:47,392 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2020-10-13 10:59:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:59:47,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-13 10:59:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:47,394 INFO L225 Difference]: With dead ends: 95 [2020-10-13 10:59:47,394 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:59:47,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:59:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:59:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 10:59:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:59:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-13 10:59:47,399 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 60 [2020-10-13 10:59:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:47,399 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-13 10:59:47,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:59:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-13 10:59:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:59:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:47,400 INFO L422 BasicCegarLoop]: trace histogram [26, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:47,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:59:47,400 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash 583937103, now seen corresponding path program 25 times [2020-10-13 10:59:47,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:47,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311004089] [2020-10-13 10:59:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:47,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:47,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:48,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:59:48,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:48,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-13 10:59:48,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:59:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 10:59:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:59:48,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:48,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:48,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:48,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:48,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:48,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:48,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:48,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:48,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 169 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-13 10:59:48,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311004089] [2020-10-13 10:59:48,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:48,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:59:48,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249734413] [2020-10-13 10:59:48,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:59:48,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:59:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:59:48,482 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 16 states. [2020-10-13 10:59:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:48,555 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-13 10:59:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:59:48,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-13 10:59:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:48,556 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:59:48,556 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:59:48,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:59:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:59:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 10:59:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:59:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-10-13 10:59:48,560 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 62 [2020-10-13 10:59:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:48,560 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-10-13 10:59:48,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:59:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-10-13 10:59:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:59:48,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:48,561 INFO L422 BasicCegarLoop]: trace histogram [27, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:48,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:59:48,562 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash -374122102, now seen corresponding path program 26 times [2020-10-13 10:59:48,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:48,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288357038] [2020-10-13 10:59:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:48,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:48,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:59:49,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:49,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-13 10:59:49,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:59:49,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:49,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:59:49,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:49,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:49,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:49,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:49,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:49,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:49,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:49,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:49,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 10:59:49,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288357038] [2020-10-13 10:59:49,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:49,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:59:49,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353744958] [2020-10-13 10:59:49,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:59:49,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:59:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:59:49,843 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 16 states. [2020-10-13 10:59:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:49,904 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-13 10:59:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:59:49,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-13 10:59:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:49,906 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:59:49,906 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 10:59:49,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:59:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 10:59:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 10:59:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:59:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-10-13 10:59:49,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 64 [2020-10-13 10:59:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:49,913 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-10-13 10:59:49,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:59:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-10-13 10:59:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:59:49,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:49,914 INFO L422 BasicCegarLoop]: trace histogram [28, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:49,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:59:49,914 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 297966535, now seen corresponding path program 27 times [2020-10-13 10:59:49,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:49,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53734114] [2020-10-13 10:59:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:51,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:59:51,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:51,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1164 [2020-10-13 10:59:51,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:59:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 10:59:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:59:51,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:51,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:51,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:51,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:51,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:51,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:51,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:51,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:51,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 196 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 10:59:51,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53734114] [2020-10-13 10:59:51,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:51,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:59:51,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39894831] [2020-10-13 10:59:51,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:59:51,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:59:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:59:51,254 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 17 states. [2020-10-13 10:59:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:51,362 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-13 10:59:51,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:59:51,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-13 10:59:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:51,363 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:59:51,363 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 10:59:51,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:59:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 10:59:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 10:59:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:59:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-10-13 10:59:51,367 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 66 [2020-10-13 10:59:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:51,367 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-10-13 10:59:51,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:59:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-10-13 10:59:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:59:51,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:51,368 INFO L422 BasicCegarLoop]: trace histogram [29, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:51,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:59:51,369 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:51,369 INFO L82 PathProgramCache]: Analyzing trace with hash -313931006, now seen corresponding path program 28 times [2020-10-13 10:59:51,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:51,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049059702] [2020-10-13 10:59:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:52,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:59:52,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:52,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-13 10:59:52,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:52,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:59:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:52,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:59:52,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:52,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:52,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:52,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:52,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:52,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:52,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:52,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:52,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:52,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 210 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 10:59:52,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049059702] [2020-10-13 10:59:52,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:52,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:59:52,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32586568] [2020-10-13 10:59:52,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:59:52,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:59:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:59:52,685 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 17 states. [2020-10-13 10:59:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:52,756 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2020-10-13 10:59:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:59:52,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 10:59:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:52,758 INFO L225 Difference]: With dead ends: 107 [2020-10-13 10:59:52,758 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:59:52,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:59:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:59:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 10:59:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 10:59:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-13 10:59:52,762 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 68 [2020-10-13 10:59:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:52,763 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-13 10:59:52,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:59:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-13 10:59:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:59:52,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:52,763 INFO L422 BasicCegarLoop]: trace histogram [30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:52,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:59:52,764 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash 457418431, now seen corresponding path program 29 times [2020-10-13 10:59:52,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:52,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722859907] [2020-10-13 10:59:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:52,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:55,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:59:55,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:55,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2238 [2020-10-13 10:59:55,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:59:55,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 10:59:55,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:59:55,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:55,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:55,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:55,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:55,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:55,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:55,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:55,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:55,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 225 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:59:55,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722859907] [2020-10-13 10:59:55,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:55,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:59:55,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377934415] [2020-10-13 10:59:55,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:59:55,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:59:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:59:55,197 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 18 states. [2020-10-13 10:59:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:55,288 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-10-13 10:59:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:59:55,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 10:59:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:55,290 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:59:55,290 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:59:55,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:59:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:59:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 10:59:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:59:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-13 10:59:55,294 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 70 [2020-10-13 10:59:55,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:55,295 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-13 10:59:55,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:59:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-13 10:59:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:59:55,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:55,296 INFO L422 BasicCegarLoop]: trace histogram [31, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:55,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:59:55,296 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1699481606, now seen corresponding path program 30 times [2020-10-13 10:59:55,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:55,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628531389] [2020-10-13 10:59:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:56,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:59:56,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:56,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:56,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:56,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:56,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:56,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:56,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:56,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 240 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 10:59:56,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628531389] [2020-10-13 10:59:56,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:56,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:59:56,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036064015] [2020-10-13 10:59:56,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:59:56,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:59:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:59:56,854 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 18 states. [2020-10-13 10:59:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:56,933 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2020-10-13 10:59:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:59:56,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-13 10:59:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:56,935 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:59:56,935 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:59:56,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:59:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:59:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 10:59:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 10:59:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-10-13 10:59:56,939 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 72 [2020-10-13 10:59:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:56,939 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-10-13 10:59:56,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:59:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-10-13 10:59:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 10:59:56,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:56,940 INFO L422 BasicCegarLoop]: trace histogram [32, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:56,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:59:56,941 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1018146103, now seen corresponding path program 31 times [2020-10-13 10:59:56,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424324385] [2020-10-13 10:59:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:56,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:57,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:59:59,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2520 [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:59:59,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:59,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:59,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:59,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 256 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 10:59:59,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424324385] [2020-10-13 10:59:59,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:59,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:59:59,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457820929] [2020-10-13 10:59:59,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:59:59,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:59:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:59:59,666 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 19 states. [2020-10-13 10:59:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:59,764 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2020-10-13 10:59:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:59:59,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2020-10-13 10:59:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:59,766 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:59:59,767 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:59:59,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:59:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:59:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 10:59:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:59:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-10-13 10:59:59,772 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 74 [2020-10-13 10:59:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:59,773 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-10-13 10:59:59,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:59:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-10-13 10:59:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:59:59,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:59,774 INFO L422 BasicCegarLoop]: trace histogram [33, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:59,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:59:59,774 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:59,775 INFO L82 PathProgramCache]: Analyzing trace with hash 288899186, now seen corresponding path program 32 times [2020-10-13 10:59:59,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:59,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268511540] [2020-10-13 10:59:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 11:00:01,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:01,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-13 11:00:01,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:00:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:01,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 11:00:01,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:01,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:01,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:01,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:01,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:01,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:01,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:01,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:01,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 272 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 11:00:01,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268511540] [2020-10-13 11:00:01,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:01,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:00:01,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690870753] [2020-10-13 11:00:01,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:00:01,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:01,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:00:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:00:01,542 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 19 states. [2020-10-13 11:00:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:01,633 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2020-10-13 11:00:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:00:01,633 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-13 11:00:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:01,634 INFO L225 Difference]: With dead ends: 119 [2020-10-13 11:00:01,635 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 11:00:01,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:00:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 11:00:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 11:00:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 11:00:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-10-13 11:00:01,643 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 76 [2020-10-13 11:00:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:01,643 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-10-13 11:00:01,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:00:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-10-13 11:00:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 11:00:01,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:01,646 INFO L422 BasicCegarLoop]: trace histogram [34, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:01,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 11:00:01,646 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash 934088495, now seen corresponding path program 33 times [2020-10-13 11:00:01,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:01,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345758605] [2020-10-13 11:00:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1752 [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:03,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:03,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:03,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:03,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 289 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-13 11:00:03,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345758605] [2020-10-13 11:00:03,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:03,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:00:03,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825988309] [2020-10-13 11:00:03,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:00:03,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:00:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:00:03,605 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 20 states. [2020-10-13 11:00:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:03,729 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-13 11:00:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:00:03,730 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-13 11:00:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:03,732 INFO L225 Difference]: With dead ends: 87 [2020-10-13 11:00:03,732 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 11:00:03,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:00:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 11:00:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 11:00:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 11:00:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-10-13 11:00:03,737 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 78 [2020-10-13 11:00:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:03,738 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-10-13 11:00:03,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:00:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-10-13 11:00:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 11:00:03,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:03,739 INFO L422 BasicCegarLoop]: trace histogram [35, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:03,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 11:00:03,739 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1113916522, now seen corresponding path program 34 times [2020-10-13 11:00:03,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:03,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840514039] [2020-10-13 11:00:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:05,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:05,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 11:00:05,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:05,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-13 11:00:05,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:05,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:00:05,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:05,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 11:00:05,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:06,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:06,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:06,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:06,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:06,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 306 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-13 11:00:06,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840514039] [2020-10-13 11:00:06,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:06,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:00:06,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149443584] [2020-10-13 11:00:06,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:00:06,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:06,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:00:06,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:00:06,016 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 20 states. [2020-10-13 11:00:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:06,094 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2020-10-13 11:00:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:00:06,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-13 11:00:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:06,096 INFO L225 Difference]: With dead ends: 125 [2020-10-13 11:00:06,096 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 11:00:06,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:00:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 11:00:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 11:00:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:00:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-10-13 11:00:06,101 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 80 [2020-10-13 11:00:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:06,101 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-10-13 11:00:06,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:00:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-10-13 11:00:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 11:00:06,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:06,102 INFO L422 BasicCegarLoop]: trace histogram [36, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:06,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 11:00:06,103 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1881812135, now seen corresponding path program 35 times [2020-10-13 11:00:06,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:06,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718733952] [2020-10-13 11:00:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:06,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:10,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4510 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 11:00:10,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:10,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:10,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:10,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:10,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:10,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:10,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:10,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:10,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 324 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 11:00:10,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718733952] [2020-10-13 11:00:10,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:10,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:00:10,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131782509] [2020-10-13 11:00:10,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:00:10,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:00:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:00:10,846 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 21 states. [2020-10-13 11:00:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:10,958 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-10-13 11:00:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:00:10,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-10-13 11:00:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:10,960 INFO L225 Difference]: With dead ends: 91 [2020-10-13 11:00:10,960 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 11:00:10,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:00:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 11:00:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 11:00:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 11:00:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2020-10-13 11:00:10,965 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 82 [2020-10-13 11:00:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:10,966 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2020-10-13 11:00:10,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:00:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2020-10-13 11:00:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 11:00:10,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:10,967 INFO L422 BasicCegarLoop]: trace histogram [37, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:10,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 11:00:10,967 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1343267810, now seen corresponding path program 36 times [2020-10-13 11:00:10,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:10,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164274374] [2020-10-13 11:00:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:10,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:11,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:13,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:00:13,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:13,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:13,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:13,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:13,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:13,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:13,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 342 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 11:00:13,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164274374] [2020-10-13 11:00:13,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:13,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:00:13,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87558968] [2020-10-13 11:00:13,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:00:13,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:00:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:00:13,507 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 21 states. [2020-10-13 11:00:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:13,591 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2020-10-13 11:00:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:00:13,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-13 11:00:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:13,592 INFO L225 Difference]: With dead ends: 131 [2020-10-13 11:00:13,592 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 11:00:13,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:00:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 11:00:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-13 11:00:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 11:00:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-10-13 11:00:13,600 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 84 [2020-10-13 11:00:13,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:13,601 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-10-13 11:00:13,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:00:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-10-13 11:00:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 11:00:13,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:13,602 INFO L422 BasicCegarLoop]: trace histogram [38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:13,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 11:00:13,602 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1247634847, now seen corresponding path program 37 times [2020-10-13 11:00:13,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:13,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651415586] [2020-10-13 11:00:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:13,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:15,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:00:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:16,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:16,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:16,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:16,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:16,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:16,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:16,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:16,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:16,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:16,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:16,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 361 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 11:00:16,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651415586] [2020-10-13 11:00:16,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:16,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:00:16,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343129964] [2020-10-13 11:00:16,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:00:16,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:00:16,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:00:16,196 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 22 states. [2020-10-13 11:00:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:16,291 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-10-13 11:00:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:00:16,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2020-10-13 11:00:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:16,292 INFO L225 Difference]: With dead ends: 95 [2020-10-13 11:00:16,292 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 11:00:16,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:00:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 11:00:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 11:00:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 11:00:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2020-10-13 11:00:16,297 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 86 [2020-10-13 11:00:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:16,297 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2020-10-13 11:00:16,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:00:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2020-10-13 11:00:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 11:00:16,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:16,299 INFO L422 BasicCegarLoop]: trace histogram [39, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:16,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 11:00:16,299 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1784250074, now seen corresponding path program 38 times [2020-10-13 11:00:16,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:16,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119528904] [2020-10-13 11:00:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:16,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:18,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:18,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 11:00:18,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:18,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2483 [2020-10-13 11:00:18,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:00:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 11:00:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:19,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 380 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 11:00:19,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119528904] [2020-10-13 11:00:19,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:19,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:00:19,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80113241] [2020-10-13 11:00:19,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:00:19,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:00:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:00:19,032 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand 22 states. [2020-10-13 11:00:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:19,096 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-10-13 11:00:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:00:19,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-13 11:00:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:19,097 INFO L225 Difference]: With dead ends: 137 [2020-10-13 11:00:19,097 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 11:00:19,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:00:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 11:00:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 11:00:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 11:00:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2020-10-13 11:00:19,103 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 88 [2020-10-13 11:00:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:19,103 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2020-10-13 11:00:19,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:00:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2020-10-13 11:00:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 11:00:19,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:19,104 INFO L422 BasicCegarLoop]: trace histogram [40, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:19,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 11:00:19,104 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash 147134999, now seen corresponding path program 39 times [2020-10-13 11:00:19,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:19,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893648948] [2020-10-13 11:00:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2723 [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 11:00:21,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:00:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:22,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:22,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:22,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:22,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 400 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-13 11:00:22,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893648948] [2020-10-13 11:00:22,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:22,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:00:22,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137202787] [2020-10-13 11:00:22,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:00:22,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:00:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:00:22,104 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand 23 states. [2020-10-13 11:00:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:22,219 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-13 11:00:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:00:22,220 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-13 11:00:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:22,221 INFO L225 Difference]: With dead ends: 99 [2020-10-13 11:00:22,221 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 11:00:22,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:00:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 11:00:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-13 11:00:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 11:00:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-13 11:00:22,226 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 90 [2020-10-13 11:00:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:22,227 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-13 11:00:22,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:00:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-13 11:00:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 11:00:22,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:22,228 INFO L422 BasicCegarLoop]: trace histogram [41, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:22,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 11:00:22,228 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash 765850962, now seen corresponding path program 40 times [2020-10-13 11:00:22,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:22,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349782565] [2020-10-13 11:00:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:22,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:22,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:22,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:25,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 11:00:25,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2907 [2020-10-13 11:00:25,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:00:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 11:00:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:25,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:25,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:25,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:25,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:25,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:25,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:25,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 420 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 11:00:25,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349782565] [2020-10-13 11:00:25,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:25,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:00:25,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106874546] [2020-10-13 11:00:25,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:00:25,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:00:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:00:25,424 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 23 states. [2020-10-13 11:00:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:25,498 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2020-10-13 11:00:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:00:25,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-13 11:00:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:25,500 INFO L225 Difference]: With dead ends: 143 [2020-10-13 11:00:25,500 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 11:00:25,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:00:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 11:00:25,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 11:00:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 11:00:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2020-10-13 11:00:25,505 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 92 [2020-10-13 11:00:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:25,506 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-10-13 11:00:25,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:00:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2020-10-13 11:00:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 11:00:25,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:25,507 INFO L422 BasicCegarLoop]: trace histogram [42, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:25,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 11:00:25,507 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash 707242511, now seen corresponding path program 41 times [2020-10-13 11:00:25,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:25,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892816424] [2020-10-13 11:00:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:25,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:28,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:28,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 11:00:28,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:28,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2908 [2020-10-13 11:00:28,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:00:28,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 11:00:28,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:00:28,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:28,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:28,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:28,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:28,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:28,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:28,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:28,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:28,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:28,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:28,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:28,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 441 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 11:00:28,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892816424] [2020-10-13 11:00:28,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:28,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:00:28,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609158091] [2020-10-13 11:00:28,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:00:28,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:00:28,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:00:28,739 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 24 states. [2020-10-13 11:00:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:28,880 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2020-10-13 11:00:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:00:28,881 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2020-10-13 11:00:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:28,882 INFO L225 Difference]: With dead ends: 103 [2020-10-13 11:00:28,882 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 11:00:28,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:00:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 11:00:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 11:00:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 11:00:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2020-10-13 11:00:28,897 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 94 [2020-10-13 11:00:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:28,899 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2020-10-13 11:00:28,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:00:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2020-10-13 11:00:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 11:00:28,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:28,900 INFO L422 BasicCegarLoop]: trace histogram [43, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:28,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 11:00:28,901 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2136709302, now seen corresponding path program 42 times [2020-10-13 11:00:28,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:28,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731015349] [2020-10-13 11:00:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:28,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3328 [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 11:00:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:32,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:32,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:32,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:32,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:32,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:32,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:32,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:32,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:32,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 462 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 11:00:32,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731015349] [2020-10-13 11:00:32,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:32,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:00:32,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829071545] [2020-10-13 11:00:32,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:00:32,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:00:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:00:32,556 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand 24 states. [2020-10-13 11:00:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:32,649 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2020-10-13 11:00:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:00:32,650 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-13 11:00:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:32,651 INFO L225 Difference]: With dead ends: 149 [2020-10-13 11:00:32,651 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 11:00:32,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:00:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 11:00:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 11:00:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 11:00:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2020-10-13 11:00:32,656 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 96 [2020-10-13 11:00:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:32,656 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2020-10-13 11:00:32,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:00:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2020-10-13 11:00:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 11:00:32,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:32,657 INFO L422 BasicCegarLoop]: trace histogram [44, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:32,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 11:00:32,658 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1200846215, now seen corresponding path program 43 times [2020-10-13 11:00:32,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:32,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633617028] [2020-10-13 11:00:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:32,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:35,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 11:00:35,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:35,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3293 [2020-10-13 11:00:35,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:35,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:00:35,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 11:00:35,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:00:35,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:36,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:36,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:36,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:36,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 484 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 11:00:36,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633617028] [2020-10-13 11:00:36,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:36,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:00:36,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709855666] [2020-10-13 11:00:36,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:00:36,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:00:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:00:36,276 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 25 states. [2020-10-13 11:00:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:36,403 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2020-10-13 11:00:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:00:36,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2020-10-13 11:00:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:36,404 INFO L225 Difference]: With dead ends: 107 [2020-10-13 11:00:36,405 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 11:00:36,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:00:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 11:00:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 11:00:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 11:00:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2020-10-13 11:00:36,411 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 98 [2020-10-13 11:00:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:36,411 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2020-10-13 11:00:36,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:00:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2020-10-13 11:00:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 11:00:36,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:36,412 INFO L422 BasicCegarLoop]: trace histogram [45, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:36,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 11:00:36,413 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash -229952318, now seen corresponding path program 44 times [2020-10-13 11:00:36,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:36,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715371559] [2020-10-13 11:00:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:39,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:39,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 11:00:39,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:39,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3571 [2020-10-13 11:00:39,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:00:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 11:00:39,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:40,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:40,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:40,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:40,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:40,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:40,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 506 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 11:00:40,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715371559] [2020-10-13 11:00:40,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:40,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:00:40,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313864998] [2020-10-13 11:00:40,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:00:40,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:00:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:00:40,396 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 25 states. [2020-10-13 11:00:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:40,498 INFO L93 Difference]: Finished difference Result 155 states and 202 transitions. [2020-10-13 11:00:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:00:40,498 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-13 11:00:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:40,499 INFO L225 Difference]: With dead ends: 155 [2020-10-13 11:00:40,499 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 11:00:40,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:00:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 11:00:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 11:00:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 11:00:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-10-13 11:00:40,504 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 100 [2020-10-13 11:00:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:40,505 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-10-13 11:00:40,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:00:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-10-13 11:00:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 11:00:40,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:40,506 INFO L422 BasicCegarLoop]: trace histogram [46, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:40,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 11:00:40,506 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:40,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:40,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1918819455, now seen corresponding path program 45 times [2020-10-13 11:00:40,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:40,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910330556] [2020-10-13 11:00:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:40,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:43,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:43,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 11:00:43,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3258 [2020-10-13 11:00:43,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:43,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:00:43,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 11:00:43,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:00:43,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:44,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:44,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:44,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:44,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:44,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:44,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:44,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 529 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-13 11:00:44,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910330556] [2020-10-13 11:00:44,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:44,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:00:44,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963657220] [2020-10-13 11:00:44,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:00:44,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:00:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:00:44,228 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 26 states. [2020-10-13 11:00:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:44,394 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-13 11:00:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:00:44,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2020-10-13 11:00:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:44,395 INFO L225 Difference]: With dead ends: 111 [2020-10-13 11:00:44,396 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 11:00:44,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:00:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 11:00:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-13 11:00:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 11:00:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-10-13 11:00:44,407 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 102 [2020-10-13 11:00:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:44,408 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-10-13 11:00:44,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:00:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-10-13 11:00:44,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 11:00:44,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:44,409 INFO L422 BasicCegarLoop]: trace histogram [47, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:44,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 11:00:44,409 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1747403334, now seen corresponding path program 46 times [2020-10-13 11:00:44,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:44,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434139032] [2020-10-13 11:00:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:44,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:44,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:49,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:49,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 11:00:49,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:49,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:00:49,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:49,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:00:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 11:00:49,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:49,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:49,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:49,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:49,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:49,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:49,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:49,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:49,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:49,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 552 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-13 11:00:49,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434139032] [2020-10-13 11:00:49,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:49,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:00:49,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61746580] [2020-10-13 11:00:49,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:00:49,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:00:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:00:49,785 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 26 states. [2020-10-13 11:00:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:49,857 INFO L93 Difference]: Finished difference Result 161 states and 210 transitions. [2020-10-13 11:00:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:00:49,857 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-13 11:00:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:49,858 INFO L225 Difference]: With dead ends: 161 [2020-10-13 11:00:49,858 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 11:00:49,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:00:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 11:00:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-13 11:00:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 11:00:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2020-10-13 11:00:49,864 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 104 [2020-10-13 11:00:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:49,864 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2020-10-13 11:00:49,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:00:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2020-10-13 11:00:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 11:00:49,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:49,865 INFO L422 BasicCegarLoop]: trace histogram [48, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:49,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 11:00:49,866 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash 304627447, now seen corresponding path program 47 times [2020-10-13 11:00:49,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:49,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415857542] [2020-10-13 11:00:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:49,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:50,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:50,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4433 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:00:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:54,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:54,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:54,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:54,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:54,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:54,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:54,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:54,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:54,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 576 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-13 11:00:54,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415857542] [2020-10-13 11:00:54,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:54,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:00:54,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488776113] [2020-10-13 11:00:54,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:00:54,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:00:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:00:54,696 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 27 states. [2020-10-13 11:00:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:54,854 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2020-10-13 11:00:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:00:54,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2020-10-13 11:00:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:54,856 INFO L225 Difference]: With dead ends: 115 [2020-10-13 11:00:54,856 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 11:00:54,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:00:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 11:00:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 11:00:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 11:00:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2020-10-13 11:00:54,862 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 106 [2020-10-13 11:00:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:54,862 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2020-10-13 11:00:54,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:00:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2020-10-13 11:00:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 11:00:54,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:54,863 INFO L422 BasicCegarLoop]: trace histogram [49, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:54,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 11:00:54,864 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1792238130, now seen corresponding path program 48 times [2020-10-13 11:00:54,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:54,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972531632] [2020-10-13 11:00:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:55,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:55,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:59,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 11:00:59,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:00:59,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4481 [2020-10-13 11:00:59,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:00:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 11:00:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:59,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:59,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:59,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:59,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:59,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:59,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 11:00:59,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972531632] [2020-10-13 11:00:59,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:59,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:00:59,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583328253] [2020-10-13 11:00:59,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:00:59,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:00:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:00:59,718 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand 27 states. [2020-10-13 11:00:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:59,822 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2020-10-13 11:00:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:00:59,824 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-13 11:00:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:59,825 INFO L225 Difference]: With dead ends: 167 [2020-10-13 11:00:59,825 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 11:00:59,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:00:59,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 11:00:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-13 11:00:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 11:00:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2020-10-13 11:00:59,831 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 108 [2020-10-13 11:00:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:59,832 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2020-10-13 11:00:59,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:00:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2020-10-13 11:00:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 11:00:59,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:59,833 INFO L422 BasicCegarLoop]: trace histogram [50, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:59,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 11:00:59,833 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1121320175, now seen corresponding path program 49 times [2020-10-13 11:00:59,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:59,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969050176] [2020-10-13 11:00:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 11:01:04,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:01:04,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:05,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:05,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:05,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:05,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:05,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 625 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 11:01:05,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969050176] [2020-10-13 11:01:05,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:05,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:01:05,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360414900] [2020-10-13 11:01:05,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:01:05,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:01:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:01:05,242 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand 28 states. [2020-10-13 11:01:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:05,405 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2020-10-13 11:01:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:01:05,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2020-10-13 11:01:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:05,407 INFO L225 Difference]: With dead ends: 119 [2020-10-13 11:01:05,407 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 11:01:05,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:01:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 11:01:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-13 11:01:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 11:01:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2020-10-13 11:01:05,412 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 110 [2020-10-13 11:01:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:05,413 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2020-10-13 11:01:05,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:01:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2020-10-13 11:01:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 11:01:05,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:05,414 INFO L422 BasicCegarLoop]: trace histogram [51, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:05,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 11:01:05,414 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:05,415 INFO L82 PathProgramCache]: Analyzing trace with hash 654934570, now seen corresponding path program 50 times [2020-10-13 11:01:05,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:05,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136005334] [2020-10-13 11:01:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:05,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:10,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:10,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 11:01:10,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:10,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:10,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:01:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:10,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 11:01:10,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:10,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:10,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:10,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 650 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 11:01:10,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136005334] [2020-10-13 11:01:10,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:10,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:01:10,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75343623] [2020-10-13 11:01:10,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:01:10,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:10,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:01:10,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:01:10,831 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand 28 states. [2020-10-13 11:01:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:10,947 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2020-10-13 11:01:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:01:10,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-10-13 11:01:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:10,951 INFO L225 Difference]: With dead ends: 173 [2020-10-13 11:01:10,951 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 11:01:10,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:01:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 11:01:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 11:01:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 11:01:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2020-10-13 11:01:10,956 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 112 [2020-10-13 11:01:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:10,957 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2020-10-13 11:01:10,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:01:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2020-10-13 11:01:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 11:01:10,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:10,958 INFO L422 BasicCegarLoop]: trace histogram [52, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:10,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 11:01:10,958 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1298762137, now seen corresponding path program 51 times [2020-10-13 11:01:10,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:10,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936027982] [2020-10-13 11:01:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:15,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:01:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:16,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:16,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:16,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:16,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:16,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:16,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:16,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:16,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:16,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 676 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-13 11:01:16,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936027982] [2020-10-13 11:01:16,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:16,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:01:16,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220352334] [2020-10-13 11:01:16,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:01:16,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:01:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:01:16,396 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand 29 states. [2020-10-13 11:01:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:16,544 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2020-10-13 11:01:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:01:16,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2020-10-13 11:01:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:16,546 INFO L225 Difference]: With dead ends: 123 [2020-10-13 11:01:16,546 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 11:01:16,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:01:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 11:01:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 11:01:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 11:01:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2020-10-13 11:01:16,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 114 [2020-10-13 11:01:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:16,551 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2020-10-13 11:01:16,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:01:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2020-10-13 11:01:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 11:01:16,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:16,552 INFO L422 BasicCegarLoop]: trace histogram [53, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:16,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 11:01:16,553 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:16,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1466860126, now seen corresponding path program 52 times [2020-10-13 11:01:16,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:16,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958786621] [2020-10-13 11:01:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:01:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 11:01:21,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:21,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:21,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:21,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 702 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 11:01:21,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958786621] [2020-10-13 11:01:21,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:21,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:01:21,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718215647] [2020-10-13 11:01:21,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:01:21,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:01:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:01:21,973 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 29 states. [2020-10-13 11:01:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:22,080 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-13 11:01:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:01:22,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-13 11:01:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:22,081 INFO L225 Difference]: With dead ends: 179 [2020-10-13 11:01:22,081 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 11:01:22,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:01:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 11:01:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-13 11:01:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 11:01:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2020-10-13 11:01:22,088 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 116 [2020-10-13 11:01:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:22,088 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2020-10-13 11:01:22,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:01:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2020-10-13 11:01:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 11:01:22,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:22,089 INFO L422 BasicCegarLoop]: trace histogram [54, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:22,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 11:01:22,090 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2094241, now seen corresponding path program 53 times [2020-10-13 11:01:22,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:22,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683809296] [2020-10-13 11:01:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:22,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:27,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:27,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 11:01:27,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:27,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:01:27,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:27,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:01:27,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 11:01:27,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:01:27,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:27,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:27,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:27,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:27,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:27,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 729 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-13 11:01:27,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683809296] [2020-10-13 11:01:27,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:27,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:01:27,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835352293] [2020-10-13 11:01:27,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:01:27,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:01:27,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:01:27,553 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand 30 states. [2020-10-13 11:01:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:27,706 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2020-10-13 11:01:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:01:27,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 118 [2020-10-13 11:01:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:27,712 INFO L225 Difference]: With dead ends: 127 [2020-10-13 11:01:27,712 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 11:01:27,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:01:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 11:01:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-13 11:01:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 11:01:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-10-13 11:01:27,717 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 118 [2020-10-13 11:01:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:27,717 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-10-13 11:01:27,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:01:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-10-13 11:01:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 11:01:27,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:27,718 INFO L422 BasicCegarLoop]: trace histogram [55, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:27,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 11:01:27,719 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -909527910, now seen corresponding path program 54 times [2020-10-13 11:01:27,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:27,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119821172] [2020-10-13 11:01:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:27,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:32,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:32,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 11:01:32,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:32,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:01:32,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:01:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 11:01:32,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:33,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:33,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:33,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:33,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:33,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 756 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-13 11:01:33,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119821172] [2020-10-13 11:01:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:33,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:01:33,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592474044] [2020-10-13 11:01:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:01:33,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:01:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:01:33,181 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 30 states. [2020-10-13 11:01:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:33,291 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2020-10-13 11:01:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:01:33,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-13 11:01:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:33,293 INFO L225 Difference]: With dead ends: 185 [2020-10-13 11:01:33,293 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 11:01:33,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:01:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 11:01:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-13 11:01:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 11:01:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2020-10-13 11:01:33,299 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 120 [2020-10-13 11:01:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:33,299 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2020-10-13 11:01:33,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:01:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2020-10-13 11:01:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 11:01:33,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:33,300 INFO L422 BasicCegarLoop]: trace histogram [56, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:33,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 11:01:33,301 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1754194985, now seen corresponding path program 55 times [2020-10-13 11:01:33,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:33,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083118387] [2020-10-13 11:01:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:33,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:38,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:38,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 11:01:38,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:38,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:38,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:38,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:01:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 11:01:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 11:01:38,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:38,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:38,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:38,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:38,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:38,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:38,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:38,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:38,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:38,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:38,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 784 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-13 11:01:38,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083118387] [2020-10-13 11:01:38,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:38,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:01:38,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800799403] [2020-10-13 11:01:38,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:01:38,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:01:38,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:01:38,803 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand 31 states. [2020-10-13 11:01:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:38,970 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2020-10-13 11:01:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:01:38,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2020-10-13 11:01:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:38,971 INFO L225 Difference]: With dead ends: 131 [2020-10-13 11:01:38,972 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 11:01:38,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:01:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 11:01:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-13 11:01:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 11:01:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2020-10-13 11:01:38,979 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 122 [2020-10-13 11:01:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:38,979 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2020-10-13 11:01:38,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:01:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2020-10-13 11:01:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 11:01:38,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:38,980 INFO L422 BasicCegarLoop]: trace histogram [57, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:38,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 11:01:38,981 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1051162862, now seen corresponding path program 56 times [2020-10-13 11:01:38,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:38,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792798564] [2020-10-13 11:01:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:39,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:43,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 11:01:43,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:43,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:43,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:01:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 11:01:43,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:44,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:44,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:44,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:44,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:44,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:44,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:44,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 812 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 11:01:44,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792798564] [2020-10-13 11:01:44,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:44,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:01:44,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698259012] [2020-10-13 11:01:44,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:01:44,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:01:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:01:44,473 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand 31 states. [2020-10-13 11:01:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:44,586 INFO L93 Difference]: Finished difference Result 191 states and 250 transitions. [2020-10-13 11:01:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:01:44,587 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 124 [2020-10-13 11:01:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:44,588 INFO L225 Difference]: With dead ends: 191 [2020-10-13 11:01:44,589 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 11:01:44,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:01:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 11:01:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 11:01:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 11:01:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2020-10-13 11:01:44,596 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 124 [2020-10-13 11:01:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:44,596 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2020-10-13 11:01:44,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:01:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2020-10-13 11:01:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 11:01:44,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:44,597 INFO L422 BasicCegarLoop]: trace histogram [58, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:44,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 11:01:44,598 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash 307234767, now seen corresponding path program 57 times [2020-10-13 11:01:44,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:44,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286255490] [2020-10-13 11:01:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:44,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:01:49,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 11:01:49,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 11:01:49,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:50,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:50,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:50,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:50,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:50,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:50,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:50,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 841 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-13 11:01:50,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286255490] [2020-10-13 11:01:50,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:50,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:01:50,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53635929] [2020-10-13 11:01:50,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:01:50,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:50,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:01:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:01:50,137 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand 32 states. [2020-10-13 11:01:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:50,323 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2020-10-13 11:01:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:01:50,323 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-10-13 11:01:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:50,326 INFO L225 Difference]: With dead ends: 135 [2020-10-13 11:01:50,326 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 11:01:50,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:01:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 11:01:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-13 11:01:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-13 11:01:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2020-10-13 11:01:50,332 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 126 [2020-10-13 11:01:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:50,332 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2020-10-13 11:01:50,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:01:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2020-10-13 11:01:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 11:01:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:50,333 INFO L422 BasicCegarLoop]: trace histogram [59, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:50,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 11:01:50,334 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2905354, now seen corresponding path program 58 times [2020-10-13 11:01:50,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:50,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792013921] [2020-10-13 11:01:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:50,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:55,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:55,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 11:01:55,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:01:55,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:01:55,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:55,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:01:55,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:55,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 11:01:55,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:55,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:55,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:55,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:55,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:55,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:01:55,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:55,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:55,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1770 proven. 870 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 11:01:55,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792013921] [2020-10-13 11:01:55,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:55,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:01:55,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151774886] [2020-10-13 11:01:55,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:01:55,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:55,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:01:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:01:55,834 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand 32 states. [2020-10-13 11:01:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:55,956 INFO L93 Difference]: Finished difference Result 197 states and 258 transitions. [2020-10-13 11:01:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:01:55,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-13 11:01:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:55,959 INFO L225 Difference]: With dead ends: 197 [2020-10-13 11:01:55,959 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 11:01:55,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:01:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 11:01:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-13 11:01:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 11:01:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2020-10-13 11:01:55,965 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 128 [2020-10-13 11:01:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:55,965 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2020-10-13 11:01:55,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:01:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2020-10-13 11:01:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-13 11:01:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:55,966 INFO L422 BasicCegarLoop]: trace histogram [60, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:55,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 11:01:55,967 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 332083015, now seen corresponding path program 59 times [2020-10-13 11:01:55,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:55,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734660816] [2020-10-13 11:01:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:55,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:56,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:00,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 11:02:00,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:01,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:01,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:01,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:01,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:01,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:01,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:01,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:01,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:01,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:01,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1830 proven. 900 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-13 11:02:01,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734660816] [2020-10-13 11:02:01,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:01,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:02:01,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665615514] [2020-10-13 11:02:01,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:02:01,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:02:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:02:01,519 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand 33 states. [2020-10-13 11:02:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:01,694 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2020-10-13 11:02:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:02:01,694 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2020-10-13 11:02:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:01,695 INFO L225 Difference]: With dead ends: 139 [2020-10-13 11:02:01,695 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 11:02:01,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:02:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 11:02:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 11:02:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 11:02:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 164 transitions. [2020-10-13 11:02:01,701 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 164 transitions. Word has length 130 [2020-10-13 11:02:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:01,701 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 164 transitions. [2020-10-13 11:02:01,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:02:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 164 transitions. [2020-10-13 11:02:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 11:02:01,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:01,702 INFO L422 BasicCegarLoop]: trace histogram [61, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:01,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 11:02:01,702 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1887732094, now seen corresponding path program 60 times [2020-10-13 11:02:01,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:01,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471700179] [2020-10-13 11:02:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:02,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:02,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:06,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:06,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 11:02:06,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:06,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:02:06,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:06,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:02:06,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:06,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 11:02:06,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:07,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:07,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:07,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:07,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:07,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:07,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:07,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 930 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 11:02:07,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471700179] [2020-10-13 11:02:07,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:07,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:02:07,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652222728] [2020-10-13 11:02:07,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:02:07,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:02:07,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:02:07,226 INFO L87 Difference]: Start difference. First operand 133 states and 164 transitions. Second operand 33 states. [2020-10-13 11:02:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:07,334 INFO L93 Difference]: Finished difference Result 203 states and 266 transitions. [2020-10-13 11:02:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:02:07,335 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-13 11:02:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:07,336 INFO L225 Difference]: With dead ends: 203 [2020-10-13 11:02:07,336 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 11:02:07,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:02:07,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 11:02:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-13 11:02:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-13 11:02:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2020-10-13 11:02:07,341 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 132 [2020-10-13 11:02:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:07,341 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2020-10-13 11:02:07,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:02:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2020-10-13 11:02:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 11:02:07,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:07,342 INFO L422 BasicCegarLoop]: trace histogram [62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:07,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 11:02:07,343 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:07,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1485245889, now seen corresponding path program 61 times [2020-10-13 11:02:07,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:07,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050488463] [2020-10-13 11:02:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:07,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:07,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 11:02:12,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:12,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:12,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:12,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:12,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:12,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:12,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:12,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:12,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:12,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1953 proven. 961 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 11:02:12,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050488463] [2020-10-13 11:02:12,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:12,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:02:12,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018823162] [2020-10-13 11:02:12,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:02:12,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:12,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:02:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:02:12,938 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand 34 states. [2020-10-13 11:02:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:13,120 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2020-10-13 11:02:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 11:02:13,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2020-10-13 11:02:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:13,122 INFO L225 Difference]: With dead ends: 143 [2020-10-13 11:02:13,122 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 11:02:13,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:02:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 11:02:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-13 11:02:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 11:02:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2020-10-13 11:02:13,131 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 134 [2020-10-13 11:02:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:13,131 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2020-10-13 11:02:13,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:02:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2020-10-13 11:02:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 11:02:13,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:13,133 INFO L422 BasicCegarLoop]: trace histogram [63, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:13,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 11:02:13,133 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash -289119366, now seen corresponding path program 62 times [2020-10-13 11:02:13,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:13,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209611209] [2020-10-13 11:02:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:13,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:18,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 11:02:18,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:02:18,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:02:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 11:02:18,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:18,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:18,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:18,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:18,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:18,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:18,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2016 proven. 992 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-13 11:02:18,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209611209] [2020-10-13 11:02:18,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:18,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:02:18,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113929832] [2020-10-13 11:02:18,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:02:18,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:02:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:02:18,704 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand 34 states. [2020-10-13 11:02:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:18,849 INFO L93 Difference]: Finished difference Result 209 states and 274 transitions. [2020-10-13 11:02:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 11:02:18,849 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-10-13 11:02:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:18,850 INFO L225 Difference]: With dead ends: 209 [2020-10-13 11:02:18,851 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 11:02:18,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:02:18,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 11:02:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-13 11:02:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 11:02:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2020-10-13 11:02:18,855 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 136 [2020-10-13 11:02:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:18,856 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2020-10-13 11:02:18,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:02:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2020-10-13 11:02:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 11:02:18,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:18,857 INFO L422 BasicCegarLoop]: trace histogram [64, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:18,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 11:02:18,857 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:18,857 INFO L82 PathProgramCache]: Analyzing trace with hash 523743415, now seen corresponding path program 63 times [2020-10-13 11:02:18,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:18,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278787486] [2020-10-13 11:02:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:19,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:19,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:23,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 11:02:23,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:24,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:24,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:24,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:24,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:24,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:24,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:24,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 1024 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 11:02:24,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278787486] [2020-10-13 11:02:24,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:24,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 11:02:24,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59927086] [2020-10-13 11:02:24,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 11:02:24,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 11:02:24,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:02:24,491 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 35 states. [2020-10-13 11:02:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:24,673 INFO L93 Difference]: Finished difference Result 147 states and 181 transitions. [2020-10-13 11:02:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:02:24,674 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2020-10-13 11:02:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:24,675 INFO L225 Difference]: With dead ends: 147 [2020-10-13 11:02:24,675 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 11:02:24,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:02:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 11:02:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-13 11:02:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 11:02:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2020-10-13 11:02:24,680 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 138 [2020-10-13 11:02:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:24,680 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2020-10-13 11:02:24,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 11:02:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2020-10-13 11:02:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 11:02:24,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:24,681 INFO L422 BasicCegarLoop]: trace histogram [65, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:24,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-13 11:02:24,682 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1909285874, now seen corresponding path program 64 times [2020-10-13 11:02:24,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:24,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997846053] [2020-10-13 11:02:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:24,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:25,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 11:02:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 11:02:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:30,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:30,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:30,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:30,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:30,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:30,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:30,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1056 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 11:02:30,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997846053] [2020-10-13 11:02:30,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:30,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 11:02:30,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220084321] [2020-10-13 11:02:30,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 11:02:30,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:30,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 11:02:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:02:30,297 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand 35 states. [2020-10-13 11:02:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:30,396 INFO L93 Difference]: Finished difference Result 215 states and 282 transitions. [2020-10-13 11:02:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:02:30,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-13 11:02:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:30,398 INFO L225 Difference]: With dead ends: 215 [2020-10-13 11:02:30,398 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 11:02:30,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:02:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 11:02:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-13 11:02:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 11:02:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2020-10-13 11:02:30,403 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 140 [2020-10-13 11:02:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:30,404 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2020-10-13 11:02:30,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 11:02:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2020-10-13 11:02:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 11:02:30,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:30,405 INFO L422 BasicCegarLoop]: trace histogram [66, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:30,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-13 11:02:30,405 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1898826415, now seen corresponding path program 65 times [2020-10-13 11:02:30,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:30,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521993493] [2020-10-13 11:02:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:30,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:30,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:35,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:35,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 11:02:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:36,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:36,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:36,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:36,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 1089 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-10-13 11:02:36,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521993493] [2020-10-13 11:02:36,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:36,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:02:36,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909541417] [2020-10-13 11:02:36,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:02:36,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:02:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:02:36,099 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand 36 states. [2020-10-13 11:02:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:36,305 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2020-10-13 11:02:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 11:02:36,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2020-10-13 11:02:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:36,307 INFO L225 Difference]: With dead ends: 151 [2020-10-13 11:02:36,307 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 11:02:36,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:02:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 11:02:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 11:02:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 11:02:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 179 transitions. [2020-10-13 11:02:36,311 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 179 transitions. Word has length 142 [2020-10-13 11:02:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:36,311 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 179 transitions. [2020-10-13 11:02:36,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:02:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 179 transitions. [2020-10-13 11:02:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 11:02:36,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:36,312 INFO L422 BasicCegarLoop]: trace histogram [67, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:36,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-13 11:02:36,313 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:36,313 INFO L82 PathProgramCache]: Analyzing trace with hash 514121706, now seen corresponding path program 66 times [2020-10-13 11:02:36,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:36,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689025146] [2020-10-13 11:02:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:36,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:36,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:41,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 11:02:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:41,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:41,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:41,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:41,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:41,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:41,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:41,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:41,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:41,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:41,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-13 11:02:42,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689025146] [2020-10-13 11:02:42,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:42,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:02:42,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021493663] [2020-10-13 11:02:42,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:02:42,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:02:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:02:42,005 INFO L87 Difference]: Start difference. First operand 145 states and 179 transitions. Second operand 36 states. [2020-10-13 11:02:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:42,153 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2020-10-13 11:02:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 11:02:42,155 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 144 [2020-10-13 11:02:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:42,156 INFO L225 Difference]: With dead ends: 221 [2020-10-13 11:02:42,157 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 11:02:42,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:02:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 11:02:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-13 11:02:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 11:02:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2020-10-13 11:02:42,161 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 144 [2020-10-13 11:02:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:42,161 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2020-10-13 11:02:42,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:02:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2020-10-13 11:02:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 11:02:42,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:42,163 INFO L422 BasicCegarLoop]: trace histogram [68, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:42,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-13 11:02:42,163 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:42,163 INFO L82 PathProgramCache]: Analyzing trace with hash 365535271, now seen corresponding path program 67 times [2020-10-13 11:02:42,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:42,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536373607] [2020-10-13 11:02:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 11:02:47,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 11:02:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 11:02:47,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:47,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:47,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:47,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:47,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:47,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:47,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:47,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:47,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 1156 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 11:02:47,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536373607] [2020-10-13 11:02:47,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:47,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 11:02:47,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986881462] [2020-10-13 11:02:47,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 11:02:47,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 11:02:47,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:02:47,899 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand 37 states. [2020-10-13 11:02:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:48,101 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2020-10-13 11:02:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:02:48,107 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2020-10-13 11:02:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:48,109 INFO L225 Difference]: With dead ends: 155 [2020-10-13 11:02:48,109 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 11:02:48,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:02:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 11:02:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-13 11:02:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 11:02:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 184 transitions. [2020-10-13 11:02:48,113 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 184 transitions. Word has length 146 [2020-10-13 11:02:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:48,114 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 184 transitions. [2020-10-13 11:02:48,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 11:02:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 184 transitions. [2020-10-13 11:02:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 11:02:48,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:48,115 INFO L422 BasicCegarLoop]: trace histogram [69, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:48,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-13 11:02:48,115 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:48,115 INFO L82 PathProgramCache]: Analyzing trace with hash 195114850, now seen corresponding path program 68 times [2020-10-13 11:02:48,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:48,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262853079] [2020-10-13 11:02:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:48,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:53,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:53,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 11:02:53,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:02:53,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 11:02:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:02:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 11:02:53,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:53,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:53,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:53,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:53,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 1190 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 11:02:53,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262853079] [2020-10-13 11:02:53,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:53,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 11:02:53,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092866088] [2020-10-13 11:02:53,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 11:02:53,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 11:02:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:02:53,832 INFO L87 Difference]: Start difference. First operand 149 states and 184 transitions. Second operand 37 states. [2020-10-13 11:02:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:53,956 INFO L93 Difference]: Finished difference Result 227 states and 298 transitions. [2020-10-13 11:02:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:02:53,956 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 148 [2020-10-13 11:02:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:53,958 INFO L225 Difference]: With dead ends: 227 [2020-10-13 11:02:53,958 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 11:02:53,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:02:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 11:02:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 11:02:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 11:02:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2020-10-13 11:02:53,963 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 148 [2020-10-13 11:02:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:53,963 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2020-10-13 11:02:53,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 11:02:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2020-10-13 11:02:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 11:02:53,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:53,965 INFO L422 BasicCegarLoop]: trace histogram [70, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:53,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-13 11:02:53,965 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1707184415, now seen corresponding path program 69 times [2020-10-13 11:02:53,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:53,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386537657] [2020-10-13 11:02:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:54,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:58,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:58,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 11:02:58,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:02:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:02:58,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:02:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 11:02:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 11:02:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:59,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:02:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:59,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:02:59,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:02:59,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:02:59,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:02:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:02:59,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:02:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:02:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:02:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:02:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:02:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 1225 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 11:02:59,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386537657] [2020-10-13 11:02:59,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:02:59,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:02:59,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68350405] [2020-10-13 11:02:59,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:02:59,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:02:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:02:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:02:59,728 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand 38 states. [2020-10-13 11:02:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:02:59,948 INFO L93 Difference]: Finished difference Result 159 states and 196 transitions. [2020-10-13 11:02:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:02:59,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 150 [2020-10-13 11:02:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:02:59,949 INFO L225 Difference]: With dead ends: 159 [2020-10-13 11:02:59,949 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 11:02:59,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:02:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 11:02:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-13 11:02:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 11:02:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2020-10-13 11:02:59,954 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 150 [2020-10-13 11:02:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:02:59,955 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2020-10-13 11:02:59,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:02:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2020-10-13 11:02:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 11:02:59,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:02:59,956 INFO L422 BasicCegarLoop]: trace histogram [71, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:02:59,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-13 11:02:59,956 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:02:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:02:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1029753434, now seen corresponding path program 70 times [2020-10-13 11:02:59,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:02:59,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365325920] [2020-10-13 11:02:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:02:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:02:59,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:04,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:04,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 11:03:04,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:04,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:03:04,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:03:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:04,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 11:03:04,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:05,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:05,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:05,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:05,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:05,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:05,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:05,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:05,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:05,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:05,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:05,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 1260 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-13 11:03:05,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365325920] [2020-10-13 11:03:05,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:05,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:03:05,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243532264] [2020-10-13 11:03:05,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:03:05,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:03:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:03:05,717 INFO L87 Difference]: Start difference. First operand 153 states and 189 transitions. Second operand 38 states. [2020-10-13 11:03:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:05,840 INFO L93 Difference]: Finished difference Result 233 states and 306 transitions. [2020-10-13 11:03:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:03:05,841 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-13 11:03:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:05,842 INFO L225 Difference]: With dead ends: 233 [2020-10-13 11:03:05,842 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 11:03:05,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:03:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 11:03:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-13 11:03:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 11:03:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2020-10-13 11:03:05,847 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 152 [2020-10-13 11:03:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:05,848 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2020-10-13 11:03:05,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:03:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2020-10-13 11:03:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-13 11:03:05,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:05,849 INFO L422 BasicCegarLoop]: trace histogram [72, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:05,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-13 11:03:05,849 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2014576023, now seen corresponding path program 71 times [2020-10-13 11:03:05,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:05,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997206823] [2020-10-13 11:03:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 11:03:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 11:03:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 11:03:10,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:11,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:11,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:11,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:11,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:11,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:11,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:11,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:11,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:11,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2628 proven. 1296 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-13 11:03:11,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997206823] [2020-10-13 11:03:11,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:11,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 11:03:11,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279353477] [2020-10-13 11:03:11,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 11:03:11,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 11:03:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:03:11,680 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand 39 states. [2020-10-13 11:03:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:11,880 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2020-10-13 11:03:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:03:11,881 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2020-10-13 11:03:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:11,882 INFO L225 Difference]: With dead ends: 163 [2020-10-13 11:03:11,882 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 11:03:11,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:03:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 11:03:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-13 11:03:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 11:03:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2020-10-13 11:03:11,887 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 154 [2020-10-13 11:03:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:11,888 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2020-10-13 11:03:11,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 11:03:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2020-10-13 11:03:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 11:03:11,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:11,889 INFO L422 BasicCegarLoop]: trace histogram [73, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:11,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-13 11:03:11,889 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash 80345298, now seen corresponding path program 72 times [2020-10-13 11:03:11,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:11,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559537138] [2020-10-13 11:03:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:12,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:16,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 11:03:16,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:17,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:17,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:17,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:17,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:17,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:17,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:17,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:17,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 1332 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-13 11:03:17,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559537138] [2020-10-13 11:03:17,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:17,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 11:03:17,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810376349] [2020-10-13 11:03:17,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 11:03:17,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 11:03:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:03:17,689 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand 39 states. [2020-10-13 11:03:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:17,805 INFO L93 Difference]: Finished difference Result 239 states and 314 transitions. [2020-10-13 11:03:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:03:17,805 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-10-13 11:03:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:17,807 INFO L225 Difference]: With dead ends: 239 [2020-10-13 11:03:17,807 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 11:03:17,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:03:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 11:03:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-10-13 11:03:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 11:03:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2020-10-13 11:03:17,811 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 156 [2020-10-13 11:03:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:17,812 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2020-10-13 11:03:17,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 11:03:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2020-10-13 11:03:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 11:03:17,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:17,813 INFO L422 BasicCegarLoop]: trace histogram [74, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:17,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-13 11:03:17,813 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2147007089, now seen corresponding path program 73 times [2020-10-13 11:03:17,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:17,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054120838] [2020-10-13 11:03:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:17,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:18,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:22,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:22,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 11:03:22,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:03:22,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 11:03:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 11:03:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 11:03:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:23,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:23,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:23,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:23,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:23,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:23,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:23,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:23,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:23,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:23,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2775 proven. 1369 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-13 11:03:23,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054120838] [2020-10-13 11:03:23,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:23,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:03:23,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879646945] [2020-10-13 11:03:23,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:03:23,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:03:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:03:23,659 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand 40 states. [2020-10-13 11:03:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:23,879 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2020-10-13 11:03:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 11:03:23,879 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 158 [2020-10-13 11:03:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:23,880 INFO L225 Difference]: With dead ends: 167 [2020-10-13 11:03:23,880 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 11:03:23,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:03:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 11:03:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-13 11:03:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 11:03:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2020-10-13 11:03:23,884 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 158 [2020-10-13 11:03:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:23,884 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2020-10-13 11:03:23,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 11:03:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2020-10-13 11:03:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 11:03:23,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:23,885 INFO L422 BasicCegarLoop]: trace histogram [75, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:23,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-13 11:03:23,886 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash -586472758, now seen corresponding path program 74 times [2020-10-13 11:03:23,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:23,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794931640] [2020-10-13 11:03:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:24,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:28,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:28,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 11:03:28,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 11:03:28,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 11:03:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 11:03:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:29,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:29,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:29,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:29,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:29,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:03:29,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:29,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:29,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:29,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:29,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 1406 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-13 11:03:29,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794931640] [2020-10-13 11:03:29,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:29,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:03:29,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176087784] [2020-10-13 11:03:29,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:03:29,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:03:29,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:03:29,721 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand 40 states. [2020-10-13 11:03:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:29,866 INFO L93 Difference]: Finished difference Result 245 states and 322 transitions. [2020-10-13 11:03:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 11:03:29,866 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 160 [2020-10-13 11:03:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:29,868 INFO L225 Difference]: With dead ends: 245 [2020-10-13 11:03:29,868 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 11:03:29,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:03:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 11:03:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-13 11:03:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 11:03:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2020-10-13 11:03:29,873 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 160 [2020-10-13 11:03:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:29,873 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2020-10-13 11:03:29,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 11:03:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2020-10-13 11:03:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 11:03:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:29,874 INFO L422 BasicCegarLoop]: trace histogram [76, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:29,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-13 11:03:29,875 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1423324921, now seen corresponding path program 75 times [2020-10-13 11:03:29,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:29,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008322675] [2020-10-13 11:03:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:29,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:34,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:34,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 11:03:34,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:35,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:35,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:35,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:35,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:35,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:03:35,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:35,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 1444 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-13 11:03:35,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008322675] [2020-10-13 11:03:35,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:35,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 11:03:35,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629494922] [2020-10-13 11:03:35,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 11:03:35,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 11:03:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 11:03:35,797 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand 41 states. [2020-10-13 11:03:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:36,019 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2020-10-13 11:03:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 11:03:36,020 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 162 [2020-10-13 11:03:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:36,020 INFO L225 Difference]: With dead ends: 171 [2020-10-13 11:03:36,021 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 11:03:36,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 11:03:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 11:03:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-13 11:03:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-13 11:03:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2020-10-13 11:03:36,024 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 162 [2020-10-13 11:03:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:36,024 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2020-10-13 11:03:36,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 11:03:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2020-10-13 11:03:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 11:03:36,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:36,026 INFO L422 BasicCegarLoop]: trace histogram [77, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:36,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-13 11:03:36,026 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash -912611262, now seen corresponding path program 76 times [2020-10-13 11:03:36,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:36,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65996858] [2020-10-13 11:03:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:36,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:36,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking...