/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:59:06,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:59:06,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:59:06,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:59:06,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:59:06,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:59:06,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:59:06,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:59:06,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:59:06,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:59:06,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:59:06,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:59:06,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:59:06,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:59:06,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:59:06,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:59:06,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:59:06,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:59:06,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:59:06,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:59:06,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:59:06,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:59:06,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:59:06,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:59:06,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:59:06,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:59:06,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:59:06,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:59:06,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:59:06,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:59:06,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:59:06,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:59:06,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:59:06,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:59:06,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:59:06,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:59:06,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:59:06,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:59:06,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:59:06,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:59:06,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:59:06,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:59:06,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:59:06,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:59:06,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:59:06,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:59:06,703 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:59:06,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:59:06,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:59:06,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:59:06,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:59:06,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:59:06,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:59:06,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:59:06,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:59:06,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:59:06,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:59:06,706 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:59:06,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:59:06,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:59:06,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:59:06,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:59:06,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:59:06,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:59:06,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:59:06,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:59:06,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:59:06,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:59:06,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:59:06,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:59:06,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:59:06,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:59:07,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:59:07,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:59:07,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:59:07,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:59:07,056 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:59:07,057 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-12 15:59:07,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa8023cdb/e3d9e27fc6d94ecaa8a1e60a3617802d/FLAG0bafc756e [2020-10-12 15:59:07,577 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:59:07,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-12 15:59:07,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa8023cdb/e3d9e27fc6d94ecaa8a1e60a3617802d/FLAG0bafc756e [2020-10-12 15:59:07,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa8023cdb/e3d9e27fc6d94ecaa8a1e60a3617802d [2020-10-12 15:59:07,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:59:07,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:59:07,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:59:07,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:59:07,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:59:07,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:59:07" (1/1) ... [2020-10-12 15:59:07,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d21840e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:07, skipping insertion in model container [2020-10-12 15:59:07,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:59:07" (1/1) ... [2020-10-12 15:59:07,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:59:08,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:59:08,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:59:08,176 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:59:08,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:59:08,218 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:59:08,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08 WrapperNode [2020-10-12 15:59:08,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:59:08,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:59:08,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:59:08,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:59:08,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... [2020-10-12 15:59:08,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:59:08,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:59:08,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:59:08,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:59:08,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:59:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:59:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:59:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 15:59:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:59:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:59:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 15:59:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:59:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:59:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:59:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:59:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:59:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:59:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:59:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:59:08,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:59:08,659 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:59:08,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:59:08 BoogieIcfgContainer [2020-10-12 15:59:08,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:59:08,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:59:08,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:59:08,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:59:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:59:07" (1/3) ... [2020-10-12 15:59:08,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298470a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:59:08, skipping insertion in model container [2020-10-12 15:59:08,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:59:08" (2/3) ... [2020-10-12 15:59:08,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298470a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:59:08, skipping insertion in model container [2020-10-12 15:59:08,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:59:08" (3/3) ... [2020-10-12 15:59:08,674 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2020-10-12 15:59:08,701 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:59:08,718 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:59:08,753 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:59:08,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:59:08,787 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:59:08,787 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:59:08,787 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:59:08,787 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:59:08,787 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:59:08,787 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:59:08,788 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:59:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 15:59:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:59:08,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:08,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:08,820 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:08,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1584649929, now seen corresponding path program 1 times [2020-10-12 15:59:08,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:08,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638200748] [2020-10-12 15:59:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:09,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:09,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:09,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:59:09,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:59:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-12 15:59:09,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:09,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:59:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:59:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 15:59:09,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:59:09,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:09,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:09,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:09,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:09,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:59:09,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:59:09,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638200748] [2020-10-12 15:59:09,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:59:09,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:59:09,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159263854] [2020-10-12 15:59:09,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:59:09,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:59:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:59:09,334 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-12 15:59:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:09,536 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-10-12 15:59:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:59:09,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 15:59:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:09,547 INFO L225 Difference]: With dead ends: 56 [2020-10-12 15:59:09,548 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 15:59:09,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:59:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 15:59:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-12 15:59:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 15:59:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-12 15:59:09,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2020-10-12 15:59:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:09,594 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-12 15:59:09,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:59:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-12 15:59:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:59:09,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:09,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:09,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:59:09,596 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1315898579, now seen corresponding path program 1 times [2020-10-12 15:59:09,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:09,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304356812] [2020-10-12 15:59:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:09,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:09,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:09,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:59:09,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 15:59:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:09,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:59:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:59:09,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:59:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-12 15:59:10,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:10,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:10,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:10,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:10,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:10,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:59:10,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:59:10,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304356812] [2020-10-12 15:59:10,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:10,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:59:10,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441909281] [2020-10-12 15:59:10,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:59:10,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:59:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:59:10,054 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-12 15:59:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:10,183 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-12 15:59:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:59:10,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-12 15:59:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:10,185 INFO L225 Difference]: With dead ends: 46 [2020-10-12 15:59:10,185 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 15:59:10,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:59:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 15:59:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-12 15:59:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 15:59:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-12 15:59:10,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-12 15:59:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:10,194 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-12 15:59:10,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:59:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-12 15:59:10,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:59:10,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:10,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:10,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:59:10,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash 516358124, now seen corresponding path program 2 times [2020-10-12 15:59:10,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:10,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302397768] [2020-10-12 15:59:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:10,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:10,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:10,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:59:10,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:10,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-12 15:59:10,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:59:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 15:59:10,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:59:10,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:10,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:10,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:10,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:10,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:10,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:59:10,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:10,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:10,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:10,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:10,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:59:10,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302397768] [2020-10-12 15:59:10,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:10,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:59:10,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648813268] [2020-10-12 15:59:10,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:59:10,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:59:10,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:59:10,660 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-10-12 15:59:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:10,822 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-12 15:59:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:59:10,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-12 15:59:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:10,824 INFO L225 Difference]: With dead ends: 56 [2020-10-12 15:59:10,824 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 15:59:10,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:59:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 15:59:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-12 15:59:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 15:59:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-12 15:59:10,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2020-10-12 15:59:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:10,840 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-12 15:59:10,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:59:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-12 15:59:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:59:10,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:10,843 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:10,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:59:10,844 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1291397115, now seen corresponding path program 3 times [2020-10-12 15:59:10,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:10,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696948414] [2020-10-12 15:59:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:10,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:11,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:11,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:59:11,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:11,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 15:59:11,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:59:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:59:11,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:59:11,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:11,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:11,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:11,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:11,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:11,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:11,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 15:59:11,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696948414] [2020-10-12 15:59:11,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:11,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:59:11,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966276525] [2020-10-12 15:59:11,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:59:11,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:59:11,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:59:11,340 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-10-12 15:59:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:11,469 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-12 15:59:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:59:11,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 15:59:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:11,471 INFO L225 Difference]: With dead ends: 66 [2020-10-12 15:59:11,471 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:59:11,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:59:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:59:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-12 15:59:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:59:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-12 15:59:11,480 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 33 [2020-10-12 15:59:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:11,480 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-12 15:59:11,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:59:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-12 15:59:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:59:11,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:11,482 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:11,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:59:11,483 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 893709598, now seen corresponding path program 4 times [2020-10-12 15:59:11,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:11,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377088009] [2020-10-12 15:59:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:11,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:12,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:12,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:59:12,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:12,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-12 15:59:12,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:59:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 15:59:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 15:59:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:12,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:12,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:12,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:12,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:12,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:12,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:12,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:12,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 15:59:12,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377088009] [2020-10-12 15:59:12,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:12,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:59:12,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244611491] [2020-10-12 15:59:12,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:59:12,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:59:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:59:12,612 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 10 states. [2020-10-12 15:59:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:12,768 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-12 15:59:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:59:12,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-12 15:59:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:12,769 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:59:12,770 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 15:59:12,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:59:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 15:59:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-12 15:59:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 15:59:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-12 15:59:12,778 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 39 [2020-10-12 15:59:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:12,779 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-12 15:59:12,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:59:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-12 15:59:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:59:12,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:12,781 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:12,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:59:12,782 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash -398483657, now seen corresponding path program 5 times [2020-10-12 15:59:12,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:12,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405550632] [2020-10-12 15:59:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:12,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:12,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:13,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:13,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:59:13,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:13,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-12 15:59:13,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:59:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 15:59:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:59:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:13,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:13,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:13,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:13,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:13,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:13,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:13,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:13,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 15:59:13,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405550632] [2020-10-12 15:59:13,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:13,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:59:13,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526619484] [2020-10-12 15:59:13,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:59:13,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:13,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:59:13,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:59:13,763 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 11 states. [2020-10-12 15:59:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:13,918 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-12 15:59:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:59:13,919 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-12 15:59:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:13,920 INFO L225 Difference]: With dead ends: 86 [2020-10-12 15:59:13,920 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 15:59:13,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:59:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 15:59:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-12 15:59:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 15:59:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-12 15:59:13,928 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 45 [2020-10-12 15:59:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:13,929 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-12 15:59:13,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:59:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-12 15:59:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:59:13,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:13,931 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:13,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:59:13,931 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash 291327568, now seen corresponding path program 6 times [2020-10-12 15:59:13,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:13,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211141264] [2020-10-12 15:59:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:13,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:15,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:15,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:59:15,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:15,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-10-12 15:59:15,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:59:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 15:59:15,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:59:15,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:15,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:15,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:15,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:15,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:15,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:15,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:15,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:15,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 15:59:15,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211141264] [2020-10-12 15:59:15,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:15,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:59:15,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944192600] [2020-10-12 15:59:15,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:59:15,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:59:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:59:15,402 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-10-12 15:59:15,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:15,612 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-12 15:59:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:59:15,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-12 15:59:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:15,614 INFO L225 Difference]: With dead ends: 96 [2020-10-12 15:59:15,614 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 15:59:15,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:59:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 15:59:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-12 15:59:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:59:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-12 15:59:15,623 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 51 [2020-10-12 15:59:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:15,624 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-12 15:59:15,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:59:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-12 15:59:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:59:15,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:15,626 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:15,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:59:15,627 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1655462505, now seen corresponding path program 7 times [2020-10-12 15:59:15,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:15,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660628568] [2020-10-12 15:59:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:15,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:17,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:17,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:59:17,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:17,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-10-12 15:59:17,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:17,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:59:17,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 15:59:17,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:59:17,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:17,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:17,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:17,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:17,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:17,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:17,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:17,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:17,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-12 15:59:17,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660628568] [2020-10-12 15:59:17,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:17,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:59:17,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910936789] [2020-10-12 15:59:17,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:59:17,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:59:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:59:17,508 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 13 states. [2020-10-12 15:59:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:17,681 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-12 15:59:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:59:17,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-12 15:59:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:17,683 INFO L225 Difference]: With dead ends: 106 [2020-10-12 15:59:17,683 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:59:17,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:59:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:59:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-12 15:59:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:59:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-12 15:59:17,698 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 57 [2020-10-12 15:59:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:17,698 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-12 15:59:17,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:59:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-12 15:59:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:59:17,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:17,703 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:17,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:59:17,704 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash -454876286, now seen corresponding path program 8 times [2020-10-12 15:59:17,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:17,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776322505] [2020-10-12 15:59:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:17,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:19,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:19,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:59:19,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:19,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2083 [2020-10-12 15:59:19,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:59:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 15:59:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:59:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:19,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:19,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:19,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:19,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:19,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:59:19,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 15:59:19,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776322505] [2020-10-12 15:59:19,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:19,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:59:19,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577414145] [2020-10-12 15:59:19,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:59:19,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:59:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:59:19,991 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 14 states. [2020-10-12 15:59:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:20,162 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-12 15:59:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:59:20,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-12 15:59:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:20,163 INFO L225 Difference]: With dead ends: 116 [2020-10-12 15:59:20,164 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:59:20,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:59:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:59:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-12 15:59:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:59:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-12 15:59:20,176 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 63 [2020-10-12 15:59:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:20,177 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-12 15:59:20,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:59:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-12 15:59:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 15:59:20,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:20,180 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:20,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:59:20,180 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1633683867, now seen corresponding path program 9 times [2020-10-12 15:59:20,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:20,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383905379] [2020-10-12 15:59:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:20,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:22,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:22,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:59:22,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2495 [2020-10-12 15:59:22,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:59:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 15:59:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:59:22,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:22,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:22,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:22,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:22,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:22,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:22,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-12 15:59:22,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383905379] [2020-10-12 15:59:22,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:22,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:59:22,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991486247] [2020-10-12 15:59:22,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:59:22,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:59:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:59:22,906 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 15 states. [2020-10-12 15:59:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:23,153 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2020-10-12 15:59:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:59:23,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-12 15:59:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:23,155 INFO L225 Difference]: With dead ends: 126 [2020-10-12 15:59:23,155 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 15:59:23,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:59:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 15:59:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-12 15:59:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:59:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-12 15:59:23,177 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 69 [2020-10-12 15:59:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:23,177 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-12 15:59:23,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:59:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-12 15:59:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 15:59:23,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:23,182 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:23,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:59:23,183 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1277783220, now seen corresponding path program 10 times [2020-10-12 15:59:23,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:23,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148312769] [2020-10-12 15:59:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:23,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:23,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:28,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:28,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 15:59:28,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 15:59:28,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:59:28,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 15:59:28,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 15:59:28,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:28,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:28,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:28,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:28,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:28,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:28,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:28,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:28,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-12 15:59:28,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148312769] [2020-10-12 15:59:28,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:28,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:59:28,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196103880] [2020-10-12 15:59:28,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:59:28,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:59:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:59:28,406 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 16 states. [2020-10-12 15:59:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:28,638 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2020-10-12 15:59:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:59:28,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-12 15:59:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:28,639 INFO L225 Difference]: With dead ends: 136 [2020-10-12 15:59:28,639 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 15:59:28,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:59:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 15:59:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-12 15:59:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 15:59:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-12 15:59:28,655 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 75 [2020-10-12 15:59:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:28,656 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-12 15:59:28,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:59:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-12 15:59:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 15:59:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:28,661 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:28,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:59:28,662 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 770550989, now seen corresponding path program 11 times [2020-10-12 15:59:28,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:28,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172749690] [2020-10-12 15:59:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:28,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:32,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:32,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 15:59:32,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:32,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3537 [2020-10-12 15:59:32,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:32,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:59:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 15:59:32,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 15:59:32,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:32,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:32,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:32,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:32,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:32,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:59:32,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:32,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:32,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:32,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:32,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-12 15:59:32,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172749690] [2020-10-12 15:59:32,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:32,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:59:32,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184256982] [2020-10-12 15:59:32,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:59:32,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:32,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:59:32,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:59:32,435 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 17 states. [2020-10-12 15:59:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:32,716 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2020-10-12 15:59:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:59:32,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-12 15:59:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:32,719 INFO L225 Difference]: With dead ends: 146 [2020-10-12 15:59:32,719 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 15:59:32,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:59:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 15:59:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-12 15:59:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 15:59:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2020-10-12 15:59:32,738 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 81 [2020-10-12 15:59:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:32,740 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2020-10-12 15:59:32,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:59:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2020-10-12 15:59:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 15:59:32,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:32,742 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:32,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:59:32,747 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1912395290, now seen corresponding path program 12 times [2020-10-12 15:59:32,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:32,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696813085] [2020-10-12 15:59:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:32,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:32,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:37,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:37,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 15:59:37,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:37,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:59:37,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:37,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:59:37,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 15:59:37,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 15:59:37,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:37,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:37,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:37,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:37,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:37,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:59:37,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:37,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:37,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-12 15:59:37,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696813085] [2020-10-12 15:59:37,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:37,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:59:37,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113226872] [2020-10-12 15:59:37,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:59:37,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:59:37,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:59:37,989 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand 18 states. [2020-10-12 15:59:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:38,229 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2020-10-12 15:59:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:59:38,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-12 15:59:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:38,232 INFO L225 Difference]: With dead ends: 156 [2020-10-12 15:59:38,232 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 15:59:38,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:59:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 15:59:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-12 15:59:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 15:59:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2020-10-12 15:59:38,246 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 87 [2020-10-12 15:59:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:38,247 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2020-10-12 15:59:38,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:59:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2020-10-12 15:59:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 15:59:38,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:38,248 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:38,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:59:38,249 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1550337023, now seen corresponding path program 13 times [2020-10-12 15:59:38,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:38,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644646638] [2020-10-12 15:59:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:43,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:43,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 15:59:43,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:59:43,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:59:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 15:59:43,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:59:43,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:43,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:43,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:43,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:43,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:43,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:59:43,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:59:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-12 15:59:43,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644646638] [2020-10-12 15:59:43,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:43,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:59:43,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575528469] [2020-10-12 15:59:43,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:59:43,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:43,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:59:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:59:43,518 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 19 states. [2020-10-12 15:59:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:43,859 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2020-10-12 15:59:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:59:43,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2020-10-12 15:59:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:43,862 INFO L225 Difference]: With dead ends: 166 [2020-10-12 15:59:43,863 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:59:43,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:59:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:59:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-12 15:59:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 15:59:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-10-12 15:59:43,878 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 93 [2020-10-12 15:59:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:43,879 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-10-12 15:59:43,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:59:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-10-12 15:59:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 15:59:43,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:43,885 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:43,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:59:43,885 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -607954152, now seen corresponding path program 14 times [2020-10-12 15:59:43,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:43,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529078317] [2020-10-12 15:59:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:43,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:48,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:48,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 15:59:48,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:48,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 15:59:48,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:48,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:59:48,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 15:59:48,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 15:59:48,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:49,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:49,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:49,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:49,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:59:49,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:49,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:49,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-12 15:59:49,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529078317] [2020-10-12 15:59:49,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:49,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:59:49,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000934432] [2020-10-12 15:59:49,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:59:49,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:59:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:59:49,161 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 20 states. [2020-10-12 15:59:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:49,407 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2020-10-12 15:59:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:59:49,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-12 15:59:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:49,408 INFO L225 Difference]: With dead ends: 176 [2020-10-12 15:59:49,408 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 15:59:49,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:59:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 15:59:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-12 15:59:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 15:59:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-12 15:59:49,416 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 99 [2020-10-12 15:59:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:49,416 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-12 15:59:49,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:59:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-12 15:59:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-12 15:59:49,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:49,417 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:49,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:59:49,418 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:49,418 INFO L82 PathProgramCache]: Analyzing trace with hash 191024945, now seen corresponding path program 15 times [2020-10-12 15:59:49,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:49,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012572225] [2020-10-12 15:59:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:49,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:53,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:53,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 15:59:53,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:53,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4560 [2020-10-12 15:59:53,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:53,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:59:53,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 15:59:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 15:59:53,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:54,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:54,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:54,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:54,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:59:54,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:54,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:54,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:54,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-12 15:59:54,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012572225] [2020-10-12 15:59:54,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:54,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:59:54,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307993593] [2020-10-12 15:59:54,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:59:54,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:59:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:59:54,259 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 21 states. [2020-10-12 15:59:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:59:54,544 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2020-10-12 15:59:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:59:54,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-10-12 15:59:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:59:54,546 INFO L225 Difference]: With dead ends: 186 [2020-10-12 15:59:54,546 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 15:59:54,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:59:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 15:59:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-12 15:59:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 15:59:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2020-10-12 15:59:54,554 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 105 [2020-10-12 15:59:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:59:54,554 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2020-10-12 15:59:54,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:59:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2020-10-12 15:59:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 15:59:54,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:59:54,556 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:59:54,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:59:54,557 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:59:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:59:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1858273206, now seen corresponding path program 16 times [2020-10-12 15:59:54,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:59:54,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710302618] [2020-10-12 15:59:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:59:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:59,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:59,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 15:59:59,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:59:59,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:59:59,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:59,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:59:59,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 15:59:59,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 15:59:59,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:59,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:59:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:59:59,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:59:59,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:59:59,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:59:59,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:59:59,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:59:59,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:59:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:59:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:59:59,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:59:59,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:59:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-12 15:59:59,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710302618] [2020-10-12 15:59:59,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:59:59,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:59:59,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480500284] [2020-10-12 15:59:59,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:59:59,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:59:59,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:59:59,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:59:59,854 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand 22 states. [2020-10-12 16:00:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:00,153 INFO L93 Difference]: Finished difference Result 196 states and 234 transitions. [2020-10-12 16:00:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:00:00,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2020-10-12 16:00:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:00,154 INFO L225 Difference]: With dead ends: 196 [2020-10-12 16:00:00,155 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 16:00:00,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:00:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 16:00:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-12 16:00:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 16:00:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-10-12 16:00:00,160 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 111 [2020-10-12 16:00:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:00,160 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-10-12 16:00:00,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:00:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-10-12 16:00:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-12 16:00:00,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:00,162 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:00,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:00:00,162 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash 602951267, now seen corresponding path program 17 times [2020-10-12 16:00:00,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:00,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766257145] [2020-10-12 16:00:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:05,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 16:00:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:00:05,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:05,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:05,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:05,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:05,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:05,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:05,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:00:05,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:05,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:05,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:05,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:05,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-12 16:00:05,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766257145] [2020-10-12 16:00:05,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:05,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:00:05,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361793119] [2020-10-12 16:00:05,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:00:05,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:05,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:00:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:00:05,492 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 23 states. [2020-10-12 16:00:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:05,811 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2020-10-12 16:00:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:00:05,811 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2020-10-12 16:00:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:05,813 INFO L225 Difference]: With dead ends: 206 [2020-10-12 16:00:05,814 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 16:00:05,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:00:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 16:00:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-12 16:00:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 16:00:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2020-10-12 16:00:05,821 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 117 [2020-10-12 16:00:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:05,821 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2020-10-12 16:00:05,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:00:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2020-10-12 16:00:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 16:00:05,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:05,823 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:05,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:00:05,823 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1958943100, now seen corresponding path program 18 times [2020-10-12 16:00:05,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:05,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326129553] [2020-10-12 16:00:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:05,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:05,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:10,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:10,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 16:00:10,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:10,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 16:00:10,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:10,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:00:10,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 16:00:10,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:00:10,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:11,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:11,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:11,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:11,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-12 16:00:11,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326129553] [2020-10-12 16:00:11,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:11,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:00:11,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77818045] [2020-10-12 16:00:11,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:00:11,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:11,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:00:11,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:00:11,170 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 24 states. [2020-10-12 16:00:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:11,501 INFO L93 Difference]: Finished difference Result 216 states and 258 transitions. [2020-10-12 16:00:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:00:11,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2020-10-12 16:00:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:11,503 INFO L225 Difference]: With dead ends: 216 [2020-10-12 16:00:11,503 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 16:00:11,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:00:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 16:00:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-12 16:00:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 16:00:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2020-10-12 16:00:11,510 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 123 [2020-10-12 16:00:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:11,511 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2020-10-12 16:00:11,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:00:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2020-10-12 16:00:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-12 16:00:11,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:11,513 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:11,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:00:11,513 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1717321323, now seen corresponding path program 19 times [2020-10-12 16:00:11,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:11,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208286692] [2020-10-12 16:00:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:11,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:11,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:16,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:16,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-12 16:00:16,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:16,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 16:00:16,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:00:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 16:00:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 16:00:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:16,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:16,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:16,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:16,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:16,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:16,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:16,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:16,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:16,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:16,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-12 16:00:16,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208286692] [2020-10-12 16:00:16,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:16,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:00:16,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825809453] [2020-10-12 16:00:16,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:00:16,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:00:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:00:16,913 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand 25 states. [2020-10-12 16:00:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:17,230 INFO L93 Difference]: Finished difference Result 226 states and 270 transitions. [2020-10-12 16:00:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:00:17,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 129 [2020-10-12 16:00:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:17,232 INFO L225 Difference]: With dead ends: 226 [2020-10-12 16:00:17,232 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 16:00:17,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:00:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 16:00:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-12 16:00:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 16:00:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2020-10-12 16:00:17,239 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 129 [2020-10-12 16:00:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:17,239 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2020-10-12 16:00:17,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:00:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2020-10-12 16:00:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-12 16:00:17,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:17,241 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:17,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:00:17,241 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:17,241 INFO L82 PathProgramCache]: Analyzing trace with hash -148330834, now seen corresponding path program 20 times [2020-10-12 16:00:17,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:17,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679146061] [2020-10-12 16:00:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:17,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:22,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:22,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-12 16:00:22,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:22,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 16:00:22,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:22,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:00:22,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 16:00:22,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:00:22,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:22,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:22,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:22,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:22,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:22,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:22,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:22,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:22,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-12 16:00:22,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679146061] [2020-10-12 16:00:22,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:22,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:00:22,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149572249] [2020-10-12 16:00:22,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:00:22,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:22,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:00:22,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:00:22,641 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 26 states. [2020-10-12 16:00:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:23,012 INFO L93 Difference]: Finished difference Result 236 states and 282 transitions. [2020-10-12 16:00:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:00:23,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2020-10-12 16:00:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:23,014 INFO L225 Difference]: With dead ends: 236 [2020-10-12 16:00:23,015 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 16:00:23,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:00:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 16:00:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-12 16:00:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 16:00:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2020-10-12 16:00:23,022 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 135 [2020-10-12 16:00:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:23,022 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2020-10-12 16:00:23,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:00:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2020-10-12 16:00:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 16:00:23,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:23,024 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:23,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:00:23,024 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1433392953, now seen corresponding path program 21 times [2020-10-12 16:00:23,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:23,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961464161] [2020-10-12 16:00:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:23,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:28,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:00:28,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:28,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:28,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:28,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:28,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-12 16:00:28,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961464161] [2020-10-12 16:00:28,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:28,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:00:28,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475079688] [2020-10-12 16:00:28,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:00:28,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:28,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:00:28,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:00:28,455 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand 27 states. [2020-10-12 16:00:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:28,828 INFO L93 Difference]: Finished difference Result 246 states and 294 transitions. [2020-10-12 16:00:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:00:28,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 141 [2020-10-12 16:00:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:28,832 INFO L225 Difference]: With dead ends: 246 [2020-10-12 16:00:28,833 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 16:00:28,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:00:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 16:00:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-12 16:00:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 16:00:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2020-10-12 16:00:28,840 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 141 [2020-10-12 16:00:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:28,840 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2020-10-12 16:00:28,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:00:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2020-10-12 16:00:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-12 16:00:28,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:28,842 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:28,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:00:28,842 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1942005728, now seen corresponding path program 22 times [2020-10-12 16:00:28,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:28,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746005995] [2020-10-12 16:00:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:28,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:29,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:33,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 16:00:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 16:00:33,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:34,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:34,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:34,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:34,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:34,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:34,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:34,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-12 16:00:34,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746005995] [2020-10-12 16:00:34,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:34,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:00:34,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990426247] [2020-10-12 16:00:34,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:00:34,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:34,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:00:34,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:00:34,284 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand 28 states. [2020-10-12 16:00:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:34,630 INFO L93 Difference]: Finished difference Result 256 states and 306 transitions. [2020-10-12 16:00:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:00:34,631 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2020-10-12 16:00:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:34,633 INFO L225 Difference]: With dead ends: 256 [2020-10-12 16:00:34,633 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 16:00:34,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:00:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 16:00:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-12 16:00:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:00:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2020-10-12 16:00:34,643 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 147 [2020-10-12 16:00:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:34,643 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2020-10-12 16:00:34,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:00:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2020-10-12 16:00:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 16:00:34,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:34,653 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:34,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:00:34,656 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash 524846073, now seen corresponding path program 23 times [2020-10-12 16:00:34,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:34,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567802189] [2020-10-12 16:00:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:34,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:35,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:39,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 16:00:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 16:00:39,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:40,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:40,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:40,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:40,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:40,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:40,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:00:40,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:40,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:40,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:40,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:40,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-12 16:00:40,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567802189] [2020-10-12 16:00:40,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:40,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:00:40,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167040965] [2020-10-12 16:00:40,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:00:40,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:00:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:00:40,253 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand 29 states. [2020-10-12 16:00:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:40,839 INFO L93 Difference]: Finished difference Result 266 states and 318 transitions. [2020-10-12 16:00:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:00:40,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2020-10-12 16:00:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:40,844 INFO L225 Difference]: With dead ends: 266 [2020-10-12 16:00:40,844 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 16:00:40,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:00:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 16:00:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-10-12 16:00:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 16:00:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2020-10-12 16:00:40,862 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 153 [2020-10-12 16:00:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:40,862 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2020-10-12 16:00:40,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:00:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2020-10-12 16:00:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-12 16:00:40,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:40,867 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:40,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:00:40,874 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1885216018, now seen corresponding path program 24 times [2020-10-12 16:00:40,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:40,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697350381] [2020-10-12 16:00:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:40,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:45,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:45,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-12 16:00:45,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:45,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 16:00:45,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:00:45,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 16:00:45,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-12 16:00:45,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:46,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:46,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:46,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:46,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:46,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:00:46,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:46,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:46,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:46,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:46,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:00:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-12 16:00:46,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697350381] [2020-10-12 16:00:46,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:46,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:00:46,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24982299] [2020-10-12 16:00:46,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:00:46,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:00:46,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:00:46,567 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand 30 states. [2020-10-12 16:00:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:47,017 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2020-10-12 16:00:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:00:47,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 159 [2020-10-12 16:00:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:47,020 INFO L225 Difference]: With dead ends: 276 [2020-10-12 16:00:47,020 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 16:00:47,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:00:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 16:00:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-12 16:00:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 16:00:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2020-10-12 16:00:47,033 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 159 [2020-10-12 16:00:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:47,033 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2020-10-12 16:00:47,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:00:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2020-10-12 16:00:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-12 16:00:47,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:47,034 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:47,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:00:47,035 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:47,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1965042901, now seen corresponding path program 25 times [2020-10-12 16:00:47,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:47,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596785416] [2020-10-12 16:00:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:47,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:52,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:52,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-12 16:00:52,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:52,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 16:00:52,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:52,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:00:52,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 16:00:52,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-12 16:00:52,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:52,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:52,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:52,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:52,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:52,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:52,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:52,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:52,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:52,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:52,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-12 16:00:52,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596785416] [2020-10-12 16:00:52,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:52,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:00:52,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402179857] [2020-10-12 16:00:52,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:00:52,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:00:52,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:00:52,647 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand 31 states. [2020-10-12 16:00:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:53,039 INFO L93 Difference]: Finished difference Result 286 states and 342 transitions. [2020-10-12 16:00:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:00:53,040 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 165 [2020-10-12 16:00:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:53,042 INFO L225 Difference]: With dead ends: 286 [2020-10-12 16:00:53,042 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 16:00:53,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:00:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 16:00:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-12 16:00:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 16:00:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2020-10-12 16:00:53,049 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 165 [2020-10-12 16:00:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:53,050 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2020-10-12 16:00:53,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:00:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2020-10-12 16:00:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-12 16:00:53,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:53,051 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:53,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:00:53,051 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -581695932, now seen corresponding path program 26 times [2020-10-12 16:00:53,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:53,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974362901] [2020-10-12 16:00:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:53,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:58,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:58,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 16:00:58,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:00:58,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 16:00:58,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:58,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:00:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 16:00:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-12 16:00:58,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:58,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:00:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:58,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:00:58,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:00:58,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:00:58,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:00:58,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:00:58,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:00:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:00:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:00:58,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:00:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-12 16:00:58,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974362901] [2020-10-12 16:00:58,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:00:58,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:00:58,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461590286] [2020-10-12 16:00:58,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:00:58,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:00:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:00:58,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:00:58,632 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand 32 states. [2020-10-12 16:00:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:00:59,078 INFO L93 Difference]: Finished difference Result 296 states and 354 transitions. [2020-10-12 16:00:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:00:59,079 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2020-10-12 16:00:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:00:59,080 INFO L225 Difference]: With dead ends: 296 [2020-10-12 16:00:59,081 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 16:00:59,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:00:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 16:00:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-12 16:00:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 16:00:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2020-10-12 16:00:59,088 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 171 [2020-10-12 16:00:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:00:59,089 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2020-10-12 16:00:59,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:00:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2020-10-12 16:00:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-12 16:00:59,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:00:59,090 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:00:59,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:00:59,091 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:00:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:00:59,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1964435875, now seen corresponding path program 27 times [2020-10-12 16:00:59,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:00:59,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029464949] [2020-10-12 16:00:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:00:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:00:59,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:00:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:04,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:04,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-12 16:01:04,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:04,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:04,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-12 16:01:04,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029464949] [2020-10-12 16:01:04,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:04,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:01:04,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788343188] [2020-10-12 16:01:04,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:01:04,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:01:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:01:04,667 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand 33 states. [2020-10-12 16:01:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:05,112 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2020-10-12 16:01:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:01:05,112 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 177 [2020-10-12 16:01:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:05,114 INFO L225 Difference]: With dead ends: 306 [2020-10-12 16:01:05,114 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 16:01:05,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:01:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 16:01:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-10-12 16:01:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 16:01:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 214 transitions. [2020-10-12 16:01:05,122 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 214 transitions. Word has length 177 [2020-10-12 16:01:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:05,123 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 214 transitions. [2020-10-12 16:01:05,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:01:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 214 transitions. [2020-10-12 16:01:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-12 16:01:05,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:05,124 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:05,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:01:05,124 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1433756534, now seen corresponding path program 28 times [2020-10-12 16:01:05,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:05,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723500397] [2020-10-12 16:01:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:10,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-12 16:01:10,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:10,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-12 16:01:10,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:10,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:01:10,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-12 16:01:10,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 16:01:10,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:10,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:10,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:10,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:10,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:10,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:10,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:01:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-12 16:01:10,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723500397] [2020-10-12 16:01:10,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:10,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:01:10,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174958187] [2020-10-12 16:01:10,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:01:10,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:01:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:01:10,787 INFO L87 Difference]: Start difference. First operand 184 states and 214 transitions. Second operand 34 states. [2020-10-12 16:01:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:11,164 INFO L93 Difference]: Finished difference Result 316 states and 378 transitions. [2020-10-12 16:01:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:01:11,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 183 [2020-10-12 16:01:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:11,166 INFO L225 Difference]: With dead ends: 316 [2020-10-12 16:01:11,167 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 16:01:11,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:01:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 16:01:11,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-12 16:01:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-12 16:01:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2020-10-12 16:01:11,175 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 183 [2020-10-12 16:01:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:11,175 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2020-10-12 16:01:11,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:01:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2020-10-12 16:01:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-12 16:01:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:11,177 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:11,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:01:11,177 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash 125259151, now seen corresponding path program 29 times [2020-10-12 16:01:11,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:11,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267126185] [2020-10-12 16:01:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:11,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 16:01:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-12 16:01:16,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:16,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:16,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:16,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:16,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:16,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:16,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:16,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:16,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:16,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:16,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-12 16:01:16,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267126185] [2020-10-12 16:01:16,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:16,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:01:16,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560918320] [2020-10-12 16:01:16,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:01:16,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:01:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:01:16,971 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand 35 states. [2020-10-12 16:01:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:17,432 INFO L93 Difference]: Finished difference Result 326 states and 390 transitions. [2020-10-12 16:01:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:01:17,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 189 [2020-10-12 16:01:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:17,434 INFO L225 Difference]: With dead ends: 326 [2020-10-12 16:01:17,434 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 16:01:17,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:01:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 16:01:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-10-12 16:01:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 16:01:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 228 transitions. [2020-10-12 16:01:17,440 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 228 transitions. Word has length 189 [2020-10-12 16:01:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:17,440 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 228 transitions. [2020-10-12 16:01:17,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:01:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 228 transitions. [2020-10-12 16:01:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-12 16:01:17,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:17,442 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:17,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:01:17,442 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1578448040, now seen corresponding path program 30 times [2020-10-12 16:01:17,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:17,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77111529] [2020-10-12 16:01:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:18,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:22,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 16:01:22,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-12 16:01:22,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:23,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:23,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:23,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:23,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:23,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:23,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:23,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:23,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:23,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-12 16:01:23,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77111529] [2020-10-12 16:01:23,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:23,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:01:23,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481749350] [2020-10-12 16:01:23,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:01:23,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:01:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:01:23,173 INFO L87 Difference]: Start difference. First operand 196 states and 228 transitions. Second operand 36 states. [2020-10-12 16:01:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:23,644 INFO L93 Difference]: Finished difference Result 336 states and 402 transitions. [2020-10-12 16:01:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:01:23,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 195 [2020-10-12 16:01:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:23,646 INFO L225 Difference]: With dead ends: 336 [2020-10-12 16:01:23,646 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 16:01:23,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:01:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 16:01:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-12 16:01:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 16:01:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 235 transitions. [2020-10-12 16:01:23,654 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 235 transitions. Word has length 195 [2020-10-12 16:01:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:23,654 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 235 transitions. [2020-10-12 16:01:23,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:01:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 235 transitions. [2020-10-12 16:01:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-12 16:01:23,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:23,656 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:23,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:01:23,656 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1931311297, now seen corresponding path program 31 times [2020-10-12 16:01:23,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:23,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313956553] [2020-10-12 16:01:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:23,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:28,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:28,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-12 16:01:28,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:28,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 16:01:28,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:01:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 16:01:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-12 16:01:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:29,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:29,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:29,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:29,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:29,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:29,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:01:29,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:29,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-12 16:01:29,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313956553] [2020-10-12 16:01:29,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:29,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:01:29,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897954916] [2020-10-12 16:01:29,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:01:29,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:29,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:01:29,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:01:29,390 INFO L87 Difference]: Start difference. First operand 202 states and 235 transitions. Second operand 37 states. [2020-10-12 16:01:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:29,897 INFO L93 Difference]: Finished difference Result 346 states and 414 transitions. [2020-10-12 16:01:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:01:29,898 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 201 [2020-10-12 16:01:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:29,900 INFO L225 Difference]: With dead ends: 346 [2020-10-12 16:01:29,900 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 16:01:29,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=905, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:01:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 16:01:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-10-12 16:01:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 16:01:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 242 transitions. [2020-10-12 16:01:29,908 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 242 transitions. Word has length 201 [2020-10-12 16:01:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:29,908 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 242 transitions. [2020-10-12 16:01:29,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:01:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 242 transitions. [2020-10-12 16:01:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-12 16:01:29,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:29,910 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:29,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:01:29,910 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1492747814, now seen corresponding path program 32 times [2020-10-12 16:01:29,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:29,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417475929] [2020-10-12 16:01:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:29,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:31,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-12 16:01:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:35,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:35,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:35,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:35,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:35,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-12 16:01:35,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417475929] [2020-10-12 16:01:35,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:35,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:01:35,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499296565] [2020-10-12 16:01:35,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:01:35,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:35,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:01:35,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:01:35,679 INFO L87 Difference]: Start difference. First operand 208 states and 242 transitions. Second operand 38 states. [2020-10-12 16:01:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:36,172 INFO L93 Difference]: Finished difference Result 356 states and 426 transitions. [2020-10-12 16:01:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:01:36,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 207 [2020-10-12 16:01:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:36,175 INFO L225 Difference]: With dead ends: 356 [2020-10-12 16:01:36,175 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 16:01:36,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=949, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:01:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 16:01:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-12 16:01:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 16:01:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 249 transitions. [2020-10-12 16:01:36,184 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 249 transitions. Word has length 207 [2020-10-12 16:01:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:36,184 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 249 transitions. [2020-10-12 16:01:36,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:01:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 249 transitions. [2020-10-12 16:01:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-12 16:01:36,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:36,186 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:36,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:01:36,186 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash 183408627, now seen corresponding path program 33 times [2020-10-12 16:01:36,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:36,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906621433] [2020-10-12 16:01:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:38,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:41,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:41,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-12 16:01:41,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:41,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 16:01:41,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:41,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:01:41,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-12 16:01:41,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 16:01:41,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:41,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:41,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:41,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:41,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-12 16:01:42,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906621433] [2020-10-12 16:01:42,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:42,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:01:42,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123162623] [2020-10-12 16:01:42,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:01:42,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:01:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:01:42,003 INFO L87 Difference]: Start difference. First operand 214 states and 249 transitions. Second operand 39 states. [2020-10-12 16:01:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:42,462 INFO L93 Difference]: Finished difference Result 366 states and 438 transitions. [2020-10-12 16:01:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:01:42,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 213 [2020-10-12 16:01:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:42,464 INFO L225 Difference]: With dead ends: 366 [2020-10-12 16:01:42,464 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 16:01:42,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=994, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:01:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 16:01:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-12 16:01:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-12 16:01:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2020-10-12 16:01:42,473 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 213 [2020-10-12 16:01:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:42,473 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2020-10-12 16:01:42,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:01:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2020-10-12 16:01:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-12 16:01:42,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:42,475 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:42,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:01:42,475 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1251750668, now seen corresponding path program 34 times [2020-10-12 16:01:42,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:42,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116306122] [2020-10-12 16:01:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:42,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:47,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:47,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-12 16:01:47,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 16:01:47,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:01:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 16:01:47,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-12 16:01:47,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:48,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:48,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:48,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:48,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:48,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:48,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-12 16:01:48,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116306122] [2020-10-12 16:01:48,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:48,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:01:48,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669990987] [2020-10-12 16:01:48,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:01:48,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:01:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:01:48,458 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand 40 states. [2020-10-12 16:01:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:48,913 INFO L93 Difference]: Finished difference Result 376 states and 450 transitions. [2020-10-12 16:01:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:01:48,914 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-10-12 16:01:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:48,916 INFO L225 Difference]: With dead ends: 376 [2020-10-12 16:01:48,916 INFO L226 Difference]: Without dead ends: 228 [2020-10-12 16:01:48,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:01:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-12 16:01:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2020-10-12 16:01:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 16:01:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2020-10-12 16:01:48,924 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 219 [2020-10-12 16:01:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:48,924 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2020-10-12 16:01:48,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:01:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2020-10-12 16:01:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-12 16:01:48,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:48,926 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:48,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:01:48,926 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:48,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:48,927 INFO L82 PathProgramCache]: Analyzing trace with hash 377334565, now seen corresponding path program 35 times [2020-10-12 16:01:48,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:48,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656510434] [2020-10-12 16:01:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:48,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:53,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:53,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-12 16:01:53,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:01:53,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 16:01:53,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:53,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:01:53,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-12 16:01:53,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-12 16:01:53,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:54,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:01:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:54,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:54,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:01:54,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:01:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:01:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-12 16:01:54,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656510434] [2020-10-12 16:01:54,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:01:54,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:01:54,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678985831] [2020-10-12 16:01:54,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:01:54,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:01:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:01:54,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:01:54,845 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand 41 states. [2020-10-12 16:01:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:01:55,379 INFO L93 Difference]: Finished difference Result 386 states and 462 transitions. [2020-10-12 16:01:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:01:55,380 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 225 [2020-10-12 16:01:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:01:55,382 INFO L225 Difference]: With dead ends: 386 [2020-10-12 16:01:55,382 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 16:01:55,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:01:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 16:01:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-12 16:01:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 16:01:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2020-10-12 16:01:55,390 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 225 [2020-10-12 16:01:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:01:55,390 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2020-10-12 16:01:55,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:01:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2020-10-12 16:01:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-12 16:01:55,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:01:55,392 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:01:55,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:01:55,393 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:01:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:01:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash 229204030, now seen corresponding path program 36 times [2020-10-12 16:01:55,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:01:55,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999344247] [2020-10-12 16:01:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:01:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:01:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:01:58,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:00,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:00,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-12 16:02:00,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 16:02:00,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:02:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-12 16:02:00,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-12 16:02:00,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:01,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:01,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:01,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:01,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:01,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:01,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:01,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:01,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:01,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:01,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:01,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-12 16:02:01,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999344247] [2020-10-12 16:02:01,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:01,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:02:01,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043718723] [2020-10-12 16:02:01,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:02:01,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:02:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:02:01,392 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand 42 states. [2020-10-12 16:02:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:01,941 INFO L93 Difference]: Finished difference Result 396 states and 474 transitions. [2020-10-12 16:02:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:02:01,941 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 231 [2020-10-12 16:02:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:01,943 INFO L225 Difference]: With dead ends: 396 [2020-10-12 16:02:01,944 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 16:02:01,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=757, Invalid=1135, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:02:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 16:02:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-10-12 16:02:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 16:02:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 277 transitions. [2020-10-12 16:02:01,950 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 277 transitions. Word has length 231 [2020-10-12 16:02:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:01,951 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 277 transitions. [2020-10-12 16:02:01,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:02:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 277 transitions. [2020-10-12 16:02:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-12 16:02:01,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:01,952 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:01,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:02:01,953 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash 668840535, now seen corresponding path program 37 times [2020-10-12 16:02:01,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:01,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129644467] [2020-10-12 16:02:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:01,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:04,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:06,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:06,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-12 16:02:06,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:06,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 16:02:06,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:02:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-12 16:02:06,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-12 16:02:06,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:08,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:08,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:08,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:08,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:08,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:08,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:08,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-12 16:02:08,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129644467] [2020-10-12 16:02:08,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:08,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:02:08,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528838706] [2020-10-12 16:02:08,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:02:08,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:02:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:02:08,207 INFO L87 Difference]: Start difference. First operand 238 states and 277 transitions. Second operand 43 states. [2020-10-12 16:02:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:08,802 INFO L93 Difference]: Finished difference Result 406 states and 486 transitions. [2020-10-12 16:02:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:02:08,803 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 237 [2020-10-12 16:02:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:08,805 INFO L225 Difference]: With dead ends: 406 [2020-10-12 16:02:08,805 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 16:02:08,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:02:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 16:02:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2020-10-12 16:02:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-12 16:02:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2020-10-12 16:02:08,817 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 237 [2020-10-12 16:02:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:08,817 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2020-10-12 16:02:08,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:02:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2020-10-12 16:02:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-12 16:02:08,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:08,820 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:08,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:02:08,821 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1618935440, now seen corresponding path program 38 times [2020-10-12 16:02:08,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:08,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785884987] [2020-10-12 16:02:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:08,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:12,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:02:13,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-12 16:02:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-12 16:02:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:14,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:14,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:14,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:14,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:14,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:14,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:14,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:14,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:14,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:14,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:14,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-12 16:02:14,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785884987] [2020-10-12 16:02:14,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:14,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:02:14,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436972297] [2020-10-12 16:02:14,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:02:14,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:02:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:02:14,848 INFO L87 Difference]: Start difference. First operand 244 states and 284 transitions. Second operand 44 states. [2020-10-12 16:02:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:15,349 INFO L93 Difference]: Finished difference Result 416 states and 498 transitions. [2020-10-12 16:02:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:02:15,349 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 243 [2020-10-12 16:02:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:15,351 INFO L225 Difference]: With dead ends: 416 [2020-10-12 16:02:15,352 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 16:02:15,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:02:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 16:02:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2020-10-12 16:02:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 16:02:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 291 transitions. [2020-10-12 16:02:15,360 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 291 transitions. Word has length 243 [2020-10-12 16:02:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:15,360 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 291 transitions. [2020-10-12 16:02:15,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:02:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 291 transitions. [2020-10-12 16:02:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-12 16:02:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:15,362 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:15,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:02:15,363 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1537322377, now seen corresponding path program 39 times [2020-10-12 16:02:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:15,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731912028] [2020-10-12 16:02:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:15,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:18,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:20,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:20,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-12 16:02:20,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:21,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:21,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:21,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:21,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:21,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:21,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:21,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:21,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-12 16:02:21,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731912028] [2020-10-12 16:02:21,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:21,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:02:21,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373465001] [2020-10-12 16:02:21,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:02:21,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:02:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:02:21,402 INFO L87 Difference]: Start difference. First operand 250 states and 291 transitions. Second operand 45 states. [2020-10-12 16:02:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:21,981 INFO L93 Difference]: Finished difference Result 426 states and 510 transitions. [2020-10-12 16:02:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:02:21,981 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 249 [2020-10-12 16:02:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:21,983 INFO L225 Difference]: With dead ends: 426 [2020-10-12 16:02:21,983 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 16:02:21,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=877, Invalid=1285, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:02:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 16:02:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-10-12 16:02:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-12 16:02:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 298 transitions. [2020-10-12 16:02:21,991 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 298 transitions. Word has length 249 [2020-10-12 16:02:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:21,992 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 298 transitions. [2020-10-12 16:02:21,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:02:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 298 transitions. [2020-10-12 16:02:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-12 16:02:21,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:21,994 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:21,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:02:21,994 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash -638183774, now seen corresponding path program 40 times [2020-10-12 16:02:21,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:21,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549913488] [2020-10-12 16:02:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:22,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:27,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:27,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-12 16:02:27,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:27,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 16:02:27,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:27,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:02:27,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 16:02:27,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-12 16:02:27,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:28,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:28,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:28,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:28,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:28,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:28,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:28,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:28,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:28,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:28,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:28,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-12 16:02:28,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549913488] [2020-10-12 16:02:28,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:28,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:02:28,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566291048] [2020-10-12 16:02:28,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:02:28,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:02:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:02:28,141 INFO L87 Difference]: Start difference. First operand 256 states and 298 transitions. Second operand 46 states. [2020-10-12 16:02:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:28,734 INFO L93 Difference]: Finished difference Result 436 states and 522 transitions. [2020-10-12 16:02:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:02:28,734 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 255 [2020-10-12 16:02:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:28,736 INFO L225 Difference]: With dead ends: 436 [2020-10-12 16:02:28,736 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 16:02:28,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:02:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 16:02:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-12 16:02:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-12 16:02:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2020-10-12 16:02:28,744 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 255 [2020-10-12 16:02:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:28,744 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2020-10-12 16:02:28,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:02:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2020-10-12 16:02:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-12 16:02:28,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:28,746 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:28,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:02:28,747 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1730372421, now seen corresponding path program 41 times [2020-10-12 16:02:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:28,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166310446] [2020-10-12 16:02:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:33,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-12 16:02:33,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-12 16:02:33,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:34,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:34,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:34,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:34,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:34,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:34,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:34,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:34,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:34,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-12 16:02:34,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166310446] [2020-10-12 16:02:34,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:34,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:02:34,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202857845] [2020-10-12 16:02:34,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:02:34,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:02:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:02:34,887 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand 47 states. [2020-10-12 16:02:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:35,489 INFO L93 Difference]: Finished difference Result 446 states and 534 transitions. [2020-10-12 16:02:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:02:35,490 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 261 [2020-10-12 16:02:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:35,492 INFO L225 Difference]: With dead ends: 446 [2020-10-12 16:02:35,492 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 16:02:35,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:02:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 16:02:35,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268. [2020-10-12 16:02:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 16:02:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 312 transitions. [2020-10-12 16:02:35,501 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 312 transitions. Word has length 261 [2020-10-12 16:02:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:35,502 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 312 transitions. [2020-10-12 16:02:35,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:02:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 312 transitions. [2020-10-12 16:02:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-12 16:02:35,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:35,504 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:35,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:02:35,504 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash 22781908, now seen corresponding path program 42 times [2020-10-12 16:02:35,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:35,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815742914] [2020-10-12 16:02:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:35,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:39,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:40,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:40,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-12 16:02:40,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:40,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 16:02:40,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:02:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-12 16:02:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-12 16:02:40,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:41,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:41,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:41,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-12 16:02:41,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815742914] [2020-10-12 16:02:41,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:41,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:02:41,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753130006] [2020-10-12 16:02:41,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:02:41,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:02:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:02:41,775 INFO L87 Difference]: Start difference. First operand 268 states and 312 transitions. Second operand 48 states. [2020-10-12 16:02:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:42,392 INFO L93 Difference]: Finished difference Result 456 states and 546 transitions. [2020-10-12 16:02:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:02:42,393 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 267 [2020-10-12 16:02:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:42,394 INFO L225 Difference]: With dead ends: 456 [2020-10-12 16:02:42,395 INFO L226 Difference]: Without dead ends: 276 [2020-10-12 16:02:42,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1006, Invalid=1444, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:02:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-12 16:02:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 274. [2020-10-12 16:02:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 16:02:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 319 transitions. [2020-10-12 16:02:42,406 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 319 transitions. Word has length 267 [2020-10-12 16:02:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:42,408 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 319 transitions. [2020-10-12 16:02:42,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:02:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 319 transitions. [2020-10-12 16:02:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-12 16:02:42,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:42,410 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:42,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:02:42,410 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash -786333715, now seen corresponding path program 43 times [2020-10-12 16:02:42,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:42,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492058697] [2020-10-12 16:02:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:42,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:46,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:47,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:47,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-12 16:02:47,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 16:02:47,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:02:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-12 16:02:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-12 16:02:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:48,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:48,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:48,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:48,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:48,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:48,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:48,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2020-10-12 16:02:48,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492058697] [2020-10-12 16:02:48,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:48,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:02:48,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438940139] [2020-10-12 16:02:48,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:02:48,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:02:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:02:48,720 INFO L87 Difference]: Start difference. First operand 274 states and 319 transitions. Second operand 49 states. [2020-10-12 16:02:49,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:49,318 INFO L93 Difference]: Finished difference Result 466 states and 558 transitions. [2020-10-12 16:02:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:02:49,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 273 [2020-10-12 16:02:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:49,320 INFO L225 Difference]: With dead ends: 466 [2020-10-12 16:02:49,321 INFO L226 Difference]: Without dead ends: 282 [2020-10-12 16:02:49,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1051, Invalid=1499, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:02:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-12 16:02:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-10-12 16:02:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 16:02:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 326 transitions. [2020-10-12 16:02:49,329 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 326 transitions. Word has length 273 [2020-10-12 16:02:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:49,329 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 326 transitions. [2020-10-12 16:02:49,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:02:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 326 transitions. [2020-10-12 16:02:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-12 16:02:49,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:49,331 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:49,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:02:49,332 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash 75799814, now seen corresponding path program 44 times [2020-10-12 16:02:49,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:49,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251740472] [2020-10-12 16:02:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:02:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:02:54,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:55,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:55,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:55,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:55,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:55,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:55,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:02:55,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:55,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2020-10-12 16:02:55,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251740472] [2020-10-12 16:02:55,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:55,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:02:55,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395388324] [2020-10-12 16:02:55,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:02:55,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:55,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:02:55,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:02:55,541 INFO L87 Difference]: Start difference. First operand 280 states and 326 transitions. Second operand 48 states. [2020-10-12 16:02:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:56,170 INFO L93 Difference]: Finished difference Result 474 states and 568 transitions. [2020-10-12 16:02:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:02:56,170 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 279 [2020-10-12 16:02:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:56,175 INFO L225 Difference]: With dead ends: 474 [2020-10-12 16:02:56,175 INFO L226 Difference]: Without dead ends: 289 [2020-10-12 16:02:56,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:02:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-12 16:02:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 282. [2020-10-12 16:02:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 16:02:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2020-10-12 16:02:56,189 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 279 [2020-10-12 16:02:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:56,189 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2020-10-12 16:02:56,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:02:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2020-10-12 16:02:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-12 16:02:56,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:56,192 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:56,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:02:56,192 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2049407196, now seen corresponding path program 45 times [2020-10-12 16:02:56,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:56,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447322664] [2020-10-12 16:02:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-12 16:03:01,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 16:03:01,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:03:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 16:03:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:02,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:02,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0