/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:55:22,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:55:22,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:55:23,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:55:23,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:55:23,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:55:23,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:55:23,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:55:23,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:55:23,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:55:23,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:55:23,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:55:23,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:55:23,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:55:23,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:55:23,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:55:23,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:55:23,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:55:23,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:55:23,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:55:23,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:55:23,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:55:23,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:55:23,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:55:23,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:55:23,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:55:23,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:55:23,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:55:23,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:55:23,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:55:23,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:55:23,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:55:23,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:55:23,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:55:23,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:55:23,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:55:23,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:55:23,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:55:23,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:55:23,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:55:23,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:55:23,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:55:23,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:55:23,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:55:23,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:55:23,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:55:23,132 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:55:23,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:55:23,132 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:55:23,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:55:23,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:55:23,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:55:23,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:55:23,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:55:23,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:55:23,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:55:23,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:55:23,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:55:23,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:55:23,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:55:23,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:55:23,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:55:23,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:55:23,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:23,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:55:23,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:55:23,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:55:23,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:55:23,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:55:23,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:55:23,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:55:23,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:55:23,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:55:23,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:55:23,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:55:23,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:55:23,503 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:55:23,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c [2020-10-13 10:55:23,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01a4507aa/0157037ff2684460b20ce2f8f6b3ed47/FLAGba636b5ad [2020-10-13 10:55:24,029 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:55:24,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de31.c [2020-10-13 10:55:24,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01a4507aa/0157037ff2684460b20ce2f8f6b3ed47/FLAGba636b5ad [2020-10-13 10:55:24,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01a4507aa/0157037ff2684460b20ce2f8f6b3ed47 [2020-10-13 10:55:24,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:55:24,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:55:24,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:24,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:55:24,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:55:24,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729acd32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24, skipping insertion in model container [2020-10-13 10:55:24,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:55:24,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:55:24,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:24,713 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:55:24,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:55:24,743 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:55:24,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24 WrapperNode [2020-10-13 10:55:24,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:55:24,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:55:24,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:55:24,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:55:24,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... [2020-10-13 10:55:24,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:55:24,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:55:24,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:55:24,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:55:24,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:55:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:55:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:55:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:55:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:55:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:55:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 10:55:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:55:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:55:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:55:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:55:25,119 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:55:25,120 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 10:55:25,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:25 BoogieIcfgContainer [2020-10-13 10:55:25,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:55:25,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:55:25,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:55:25,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:55:25,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:55:24" (1/3) ... [2020-10-13 10:55:25,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:25, skipping insertion in model container [2020-10-13 10:55:25,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:55:24" (2/3) ... [2020-10-13 10:55:25,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@464e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:55:25, skipping insertion in model container [2020-10-13 10:55:25,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:55:25" (3/3) ... [2020-10-13 10:55:25,133 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de31.c [2020-10-13 10:55:25,144 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:55:25,152 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:55:25,168 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:55:25,199 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:55:25,199 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:55:25,200 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:55:25,200 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:55:25,200 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:55:25,200 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:55:25,200 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:55:25,200 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:55:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-13 10:55:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:55:25,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:25,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:25,236 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1939139363, now seen corresponding path program 1 times [2020-10-13 10:55:25,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:25,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636078766] [2020-10-13 10:55:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:25,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:25,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:25,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:55:25,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:25,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-13 10:55:25,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:25,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:55:25,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:25,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:55:25,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:55:26,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:26,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:26,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:26,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:26,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:26,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:26,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:26,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:26,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:26,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:26,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:55:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:26,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636078766] [2020-10-13 10:55:26,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:26,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:55:26,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941221808] [2020-10-13 10:55:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:55:26,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:55:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:26,255 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-10-13 10:55:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:26,532 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2020-10-13 10:55:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:55:26,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-13 10:55:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:26,553 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:55:26,553 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:55:26,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:55:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-10-13 10:55:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:55:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-13 10:55:26,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2020-10-13 10:55:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:26,614 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-13 10:55:26,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:55:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-13 10:55:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:55:26,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:26,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:26,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:55:26,617 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash 51759658, now seen corresponding path program 1 times [2020-10-13 10:55:26,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:26,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970683886] [2020-10-13 10:55:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:26,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:26,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:26,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:55:26,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:26,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-13 10:55:26,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:55:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:55:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:55:26,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:26,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:26,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:26,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:26,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:26,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:26,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:26,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:26,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:26,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:26,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:26,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970683886] [2020-10-13 10:55:26,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:55:26,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:55:26,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536535937] [2020-10-13 10:55:26,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:55:26,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:55:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:55:26,872 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2020-10-13 10:55:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:26,945 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-13 10:55:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:55:26,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:55:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:26,947 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:55:26,947 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:55:26,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:55:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-13 10:55:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:55:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-13 10:55:26,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-13 10:55:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:26,953 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-13 10:55:26,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:55:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-13 10:55:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:55:26,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:26,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:26,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:55:26,955 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash 870120472, now seen corresponding path program 1 times [2020-10-13 10:55:26,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:26,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985343500] [2020-10-13 10:55:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:26,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:55:27,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:27,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-13 10:55:27,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:55:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:27,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:55:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:27,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:27,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:27,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:27,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:27,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:27,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:27,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:27,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985343500] [2020-10-13 10:55:27,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:27,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:55:27,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975610299] [2020-10-13 10:55:27,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:55:27,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:27,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:55:27,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:55:27,147 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-10-13 10:55:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:27,200 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-13 10:55:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:55:27,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 10:55:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:27,202 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:55:27,202 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:55:27,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:55:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-13 10:55:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:55:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-10-13 10:55:27,209 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2020-10-13 10:55:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:27,210 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-10-13 10:55:27,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:55:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-10-13 10:55:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:55:27,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:27,211 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:27,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:55:27,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2057829437, now seen corresponding path program 2 times [2020-10-13 10:55:27,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:27,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269515159] [2020-10-13 10:55:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:55:27,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-13 10:55:27,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:27,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:27,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:27,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:27,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:27,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:27,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:27,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:27,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269515159] [2020-10-13 10:55:27,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:27,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:27,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81732786] [2020-10-13 10:55:27,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:27,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:27,590 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states. [2020-10-13 10:55:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:27,668 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-10-13 10:55:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:27,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-13 10:55:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:27,670 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:55:27,670 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:55:27,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:55:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:55:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-13 10:55:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:55:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-13 10:55:27,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2020-10-13 10:55:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:27,678 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-13 10:55:27,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-13 10:55:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:55:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:27,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:27,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:55:27,680 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash 342366825, now seen corresponding path program 1 times [2020-10-13 10:55:27,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:27,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953650188] [2020-10-13 10:55:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:27,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:55:27,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:27,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-13 10:55:27,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:55:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:55:27,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:28,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:28,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:28,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:28,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953650188] [2020-10-13 10:55:28,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:28,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:28,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643032767] [2020-10-13 10:55:28,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:28,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:28,222 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-10-13 10:55:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:28,618 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-13 10:55:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:55:28,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-13 10:55:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:28,619 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:55:28,619 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:55:28,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:55:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-13 10:55:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:55:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-13 10:55:28,628 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 16 [2020-10-13 10:55:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:28,629 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-13 10:55:28,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:55:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-13 10:55:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:55:28,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:28,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:28,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:55:28,631 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:28,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1697985137, now seen corresponding path program 2 times [2020-10-13 10:55:28,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:28,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945564684] [2020-10-13 10:55:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:55:28,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-13 10:55:28,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:28,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:28,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:28,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:28,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:28,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:55:28,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945564684] [2020-10-13 10:55:28,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:28,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:28,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270094431] [2020-10-13 10:55:28,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:28,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:28,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:28,957 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2020-10-13 10:55:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:29,014 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-13 10:55:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:29,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 10:55:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:29,016 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:55:29,016 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:55:29,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:55:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:55:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:55:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-13 10:55:29,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2020-10-13 10:55:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:29,024 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-13 10:55:29,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-13 10:55:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:55:29,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:29,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:29,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:55:29,026 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1138800679, now seen corresponding path program 3 times [2020-10-13 10:55:29,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:29,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476524383] [2020-10-13 10:55:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:29,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:55:29,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:29,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-13 10:55:29,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:29,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:55:29,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:55:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:29,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:29,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:29,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:29,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:29,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:29,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476524383] [2020-10-13 10:55:29,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:29,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:29,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334003009] [2020-10-13 10:55:29,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:29,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:29,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:29,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:29,418 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-10-13 10:55:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:29,472 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-13 10:55:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:55:29,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:55:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:29,474 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:55:29,474 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:55:29,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:55:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:55:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:55:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 10:55:29,481 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-13 10:55:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:29,482 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 10:55:29,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 10:55:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:55:29,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:29,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:29,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:55:29,484 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1409184419, now seen corresponding path program 4 times [2020-10-13 10:55:29,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:29,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053074702] [2020-10-13 10:55:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:29,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:29,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:55:29,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:29,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-13 10:55:29,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:29,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:55:29,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:29,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:55:29,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:30,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:30,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:30,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:30,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:30,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:30,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053074702] [2020-10-13 10:55:30,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:30,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:55:30,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811637837] [2020-10-13 10:55:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:55:30,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:55:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:30,142 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-13 10:55:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:30,285 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-13 10:55:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:55:30,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-13 10:55:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:30,287 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:55:30,287 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:55:30,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:55:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:55:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:55:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:55:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 10:55:30,293 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2020-10-13 10:55:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:30,293 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 10:55:30,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:55:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 10:55:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:55:30,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:30,294 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:30,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:55:30,295 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash -947583761, now seen corresponding path program 5 times [2020-10-13 10:55:30,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:30,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008050769] [2020-10-13 10:55:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:30,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:55:30,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:30,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-13 10:55:30,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:55:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:55:30,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:55:30,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:30,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:30,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:30,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:30,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:30,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:30,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:30,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:55:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008050769] [2020-10-13 10:55:30,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:30,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:55:30,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38874452] [2020-10-13 10:55:30,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:55:30,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:55:30,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:55:30,784 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-13 10:55:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:30,862 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-13 10:55:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:55:30,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 10:55:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:30,864 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:55:30,864 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:55:30,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:55:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:55:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:55:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:55:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 10:55:30,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2020-10-13 10:55:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:30,870 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 10:55:30,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:55:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 10:55:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:55:30,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:30,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:30,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:55:30,872 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash 725212248, now seen corresponding path program 6 times [2020-10-13 10:55:30,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:30,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220455812] [2020-10-13 10:55:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:30,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:31,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:31,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:55:31,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:31,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-13 10:55:31,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:55:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:55:31,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:31,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:31,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:31,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:31,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:31,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:31,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:31,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220455812] [2020-10-13 10:55:31,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:31,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:55:31,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538746387] [2020-10-13 10:55:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:55:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:55:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:55:31,617 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-10-13 10:55:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:31,746 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-13 10:55:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:55:31,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-13 10:55:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:31,748 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:55:31,748 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:55:31,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:55:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:55:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 10:55:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:55:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 10:55:31,755 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-10-13 10:55:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:31,756 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 10:55:31,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:55:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 10:55:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:55:31,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:31,757 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:31,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:55:31,757 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1827967811, now seen corresponding path program 7 times [2020-10-13 10:55:31,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:31,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523951624] [2020-10-13 10:55:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:31,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:31,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:32,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:32,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:32,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:55:32,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:32,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-13 10:55:32,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:32,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:55:32,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:55:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:32,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:32,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:32,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:32,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:32,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:32,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:32,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523951624] [2020-10-13 10:55:32,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:32,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:32,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079703284] [2020-10-13 10:55:32,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:32,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:32,732 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-10-13 10:55:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:32,943 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-13 10:55:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:55:32,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-13 10:55:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:32,945 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:55:32,945 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:55:32,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:55:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-13 10:55:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:55:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-13 10:55:32,955 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2020-10-13 10:55:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:32,955 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-13 10:55:32,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:55:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-13 10:55:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:55:32,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:32,957 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:32,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:55:32,957 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:32,957 INFO L82 PathProgramCache]: Analyzing trace with hash -384445847, now seen corresponding path program 8 times [2020-10-13 10:55:32,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:32,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895058389] [2020-10-13 10:55:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:33,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:33,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:55:33,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:33,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-13 10:55:33,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:55:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:55:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:34,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:34,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:55:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:55:34,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895058389] [2020-10-13 10:55:34,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:34,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:55:34,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594102136] [2020-10-13 10:55:34,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:55:34,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:34,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:55:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:55:34,143 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 14 states. [2020-10-13 10:55:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:34,614 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-13 10:55:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:55:34,615 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-13 10:55:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:34,616 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:55:34,616 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:55:34,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:55:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:55:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 10:55:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:55:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-13 10:55:34,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-10-13 10:55:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:34,627 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-13 10:55:34,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:55:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-13 10:55:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:55:34,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:34,628 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:34,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:55:34,629 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash 627828984, now seen corresponding path program 9 times [2020-10-13 10:55:34,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:34,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663191978] [2020-10-13 10:55:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:34,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:35,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:55:35,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:35,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-13 10:55:35,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:55:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:55:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:35,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:35,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:35,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:35,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:35,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:35,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:35,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:35,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:35,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663191978] [2020-10-13 10:55:35,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:35,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:55:35,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125992166] [2020-10-13 10:55:35,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:55:35,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:55:35,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:55:35,877 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 11 states. [2020-10-13 10:55:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:36,107 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-10-13 10:55:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:55:36,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-13 10:55:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:36,109 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:55:36,109 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:55:36,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:55:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:55:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-13 10:55:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:55:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-13 10:55:36,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 22 [2020-10-13 10:55:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:36,123 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-13 10:55:36,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:55:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-13 10:55:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:55:36,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:36,126 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:36,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:55:36,127 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash -551881699, now seen corresponding path program 10 times [2020-10-13 10:55:36,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:36,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406397843] [2020-10-13 10:55:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:36,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:36,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:37,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:37,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:55:37,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:37,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-13 10:55:37,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:55:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:55:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:37,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:37,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:37,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:37,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:37,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:37,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:37,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:37,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:37,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:37,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:37,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:37,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406397843] [2020-10-13 10:55:37,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:37,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:55:37,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138870818] [2020-10-13 10:55:37,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:55:37,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:55:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:55:37,317 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 12 states. [2020-10-13 10:55:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:37,681 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-13 10:55:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:55:37,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-13 10:55:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:37,683 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:55:37,684 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:55:37,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:55:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:55:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-13 10:55:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:55:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-13 10:55:37,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2020-10-13 10:55:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:37,710 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-13 10:55:37,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:55:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-13 10:55:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:55:37,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:37,715 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:37,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:55:37,715 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1208674407, now seen corresponding path program 11 times [2020-10-13 10:55:37,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:37,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130740012] [2020-10-13 10:55:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:37,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:38,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:39,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:39,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:55:39,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:39,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-13 10:55:39,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:39,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:55:39,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:55:39,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:55:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:39,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:39,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:39,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:39,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:55:39,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130740012] [2020-10-13 10:55:39,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:39,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:55:39,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567886808] [2020-10-13 10:55:39,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:55:39,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:55:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:55:39,259 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-10-13 10:55:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:39,490 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2020-10-13 10:55:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:55:39,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-13 10:55:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:39,492 INFO L225 Difference]: With dead ends: 79 [2020-10-13 10:55:39,492 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 10:55:39,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:55:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 10:55:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-13 10:55:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:55:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-13 10:55:39,515 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 24 [2020-10-13 10:55:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:39,516 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-13 10:55:39,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:55:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-13 10:55:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:55:39,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:39,519 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:39,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:55:39,519 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1531792792, now seen corresponding path program 12 times [2020-10-13 10:55:39,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:39,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636253469] [2020-10-13 10:55:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:39,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:55:40,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:40,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-13 10:55:40,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:55:40,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:40,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:55:40,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:55:40,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:40,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:40,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:40,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:40,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:40,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:40,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636253469] [2020-10-13 10:55:40,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:40,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:55:40,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576261917] [2020-10-13 10:55:40,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:55:40,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:40,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:55:40,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:55:40,985 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 13 states. [2020-10-13 10:55:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:41,333 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2020-10-13 10:55:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:55:41,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-13 10:55:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:41,335 INFO L225 Difference]: With dead ends: 85 [2020-10-13 10:55:41,335 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:55:41,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:55:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:55:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-13 10:55:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:55:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-13 10:55:41,362 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 24 [2020-10-13 10:55:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:41,363 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-13 10:55:41,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:55:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-13 10:55:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:55:41,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:41,364 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:41,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:55:41,364 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash 182109661, now seen corresponding path program 13 times [2020-10-13 10:55:41,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:41,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684243914] [2020-10-13 10:55:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:41,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:55:41,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:55:41,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-13 10:55:41,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:55:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:55:41,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:42,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:42,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:42,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:42,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:42,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:42,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:55:42,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684243914] [2020-10-13 10:55:42,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:42,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:55:42,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798104250] [2020-10-13 10:55:42,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:55:42,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:42,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:55:42,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:42,466 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 15 states. [2020-10-13 10:55:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:47,251 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-13 10:55:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:55:47,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-13 10:55:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:47,253 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:55:47,253 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:55:47,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=55, Invalid=406, Unknown=1, NotChecked=0, Total=462 [2020-10-13 10:55:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:55:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 10:55:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:55:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-13 10:55:47,272 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 25 [2020-10-13 10:55:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:47,272 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-13 10:55:47,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:55:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-13 10:55:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:55:47,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:47,273 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:47,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:55:47,274 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:47,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1701192573, now seen corresponding path program 14 times [2020-10-13 10:55:47,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:47,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468292993] [2020-10-13 10:55:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:47,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:47,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:47,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:48,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:55:48,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:48,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-13 10:55:48,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:55:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:55:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:48,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:48,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:48,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:48,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:48,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:48,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:48,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:48,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468292993] [2020-10-13 10:55:48,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:48,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:55:48,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98051335] [2020-10-13 10:55:48,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:55:48,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:55:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:55:48,868 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 14 states. [2020-10-13 10:55:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:49,256 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-10-13 10:55:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:55:49,257 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-13 10:55:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:49,258 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:55:49,258 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:55:49,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:55:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:55:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2020-10-13 10:55:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:55:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-13 10:55:49,282 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 25 [2020-10-13 10:55:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:49,282 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-13 10:55:49,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:55:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-13 10:55:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:55:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:49,283 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:49,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:55:49,283 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1637348808, now seen corresponding path program 15 times [2020-10-13 10:55:49,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:49,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452360377] [2020-10-13 10:55:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:49,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:49,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:50,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:51,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:55:51,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:51,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1856 [2020-10-13 10:55:51,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:55:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:55:51,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:51,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:51,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:51,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:51,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:51,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:51,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:51,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:55:51,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452360377] [2020-10-13 10:55:51,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:51,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:55:51,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052622829] [2020-10-13 10:55:51,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:55:51,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:51,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:55:51,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:55:51,359 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 15 states. [2020-10-13 10:55:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:51,806 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2020-10-13 10:55:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:55:51,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-13 10:55:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:51,808 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:55:51,808 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:55:51,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:55:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:55:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2020-10-13 10:55:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:55:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-10-13 10:55:51,820 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 26 [2020-10-13 10:55:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:51,820 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-10-13 10:55:51,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:55:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-10-13 10:55:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:55:51,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:51,821 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:51,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:55:51,822 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 970402255, now seen corresponding path program 16 times [2020-10-13 10:55:51,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:51,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254858829] [2020-10-13 10:55:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:51,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:54,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:54,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:55:54,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:55:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2620 [2020-10-13 10:55:54,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:55:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:55:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:55:54,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:58,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:58,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:58,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:58,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:58,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:55:58,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 17 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 10:55:58,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254858829] [2020-10-13 10:55:58,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:58,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:55:58,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162657373] [2020-10-13 10:55:58,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:55:58,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:55:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=107, Unknown=2, NotChecked=0, Total=132 [2020-10-13 10:55:58,885 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 12 states. [2020-10-13 10:55:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:59,302 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2020-10-13 10:55:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:55:59,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-13 10:55:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:59,306 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:55:59,306 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:55:59,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=39, Invalid=199, Unknown=2, NotChecked=0, Total=240 [2020-10-13 10:55:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:55:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2020-10-13 10:55:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:55:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-13 10:55:59,320 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 27 [2020-10-13 10:55:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:59,321 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-13 10:55:59,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:55:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-13 10:55:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:55:59,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:59,322 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:59,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:55:59,322 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2052916515, now seen corresponding path program 17 times [2020-10-13 10:55:59,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:59,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597390595] [2020-10-13 10:55:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:00,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:00,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:56:00,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:00,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-13 10:56:00,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:00,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:56:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:00,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:56:00,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:01,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:01,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:01,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:01,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:01,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:01,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:01,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:01,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:01,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:01,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597390595] [2020-10-13 10:56:01,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:01,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:56:01,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532336755] [2020-10-13 10:56:01,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:56:01,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:01,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:56:01,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:56:01,126 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 16 states. [2020-10-13 10:56:01,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:01,682 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2020-10-13 10:56:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:56:01,683 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-13 10:56:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:01,684 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:56:01,684 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:56:01,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:56:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:56:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2020-10-13 10:56:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:56:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-10-13 10:56:01,699 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 27 [2020-10-13 10:56:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:01,699 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-10-13 10:56:01,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:56:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-10-13 10:56:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:56:01,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:01,700 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:01,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:56:01,701 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2098034071, now seen corresponding path program 18 times [2020-10-13 10:56:01,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:01,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912266367] [2020-10-13 10:56:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:01,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:01,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:02,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:02,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:56:02,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-13 10:56:02,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:56:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:56:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:03,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:03,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:03,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:03,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:03,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:03,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:03,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:03,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 10:56:03,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912266367] [2020-10-13 10:56:03,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:03,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:56:03,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739988839] [2020-10-13 10:56:03,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:56:03,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:56:03,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:03,140 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 17 states. [2020-10-13 10:56:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:08,611 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-13 10:56:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:56:08,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-13 10:56:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:08,614 INFO L225 Difference]: With dead ends: 108 [2020-10-13 10:56:08,614 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:56:08,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=124, Invalid=1134, Unknown=2, NotChecked=0, Total=1260 [2020-10-13 10:56:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:56:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:56:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:56:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-10-13 10:56:08,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 28 [2020-10-13 10:56:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:08,633 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-10-13 10:56:08,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:56:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-10-13 10:56:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:56:08,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:08,634 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:08,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:56:08,635 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2050613544, now seen corresponding path program 19 times [2020-10-13 10:56:08,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:08,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377268026] [2020-10-13 10:56:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:08,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:08,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:09,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:10,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:56:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:10,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:10,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:10,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:10,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:10,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:10,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:10,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:10,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:10,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377268026] [2020-10-13 10:56:10,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:10,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:56:10,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243055488] [2020-10-13 10:56:10,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:56:10,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:56:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:56:10,679 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 17 states. [2020-10-13 10:56:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:11,277 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2020-10-13 10:56:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:56:11,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-13 10:56:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:11,278 INFO L225 Difference]: With dead ends: 125 [2020-10-13 10:56:11,279 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:56:11,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:56:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:56:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2020-10-13 10:56:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:56:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-13 10:56:11,295 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 28 [2020-10-13 10:56:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:11,296 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-13 10:56:11,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:56:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-13 10:56:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:56:11,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:11,297 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:11,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:56:11,298 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1979221443, now seen corresponding path program 20 times [2020-10-13 10:56:11,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:11,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291190905] [2020-10-13 10:56:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:11,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:11,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1146 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:56:12,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:12,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:12,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:12,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:12,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:12,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:12,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:12,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:12,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:12,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291190905] [2020-10-13 10:56:12,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:12,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:56:12,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830411870] [2020-10-13 10:56:12,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:56:12,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:56:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:56:12,748 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 18 states. [2020-10-13 10:56:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:13,384 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2020-10-13 10:56:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:56:13,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-13 10:56:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:13,386 INFO L225 Difference]: With dead ends: 135 [2020-10-13 10:56:13,386 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:56:13,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:56:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:56:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2020-10-13 10:56:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:56:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2020-10-13 10:56:13,402 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 29 [2020-10-13 10:56:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:13,402 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2020-10-13 10:56:13,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:56:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2020-10-13 10:56:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:56:13,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:13,403 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:13,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:56:13,403 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1634146137, now seen corresponding path program 21 times [2020-10-13 10:56:13,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:13,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59588263] [2020-10-13 10:56:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:13,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:13,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:15,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2227 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:56:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:15,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:15,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:15,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:15,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:15,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:56:15,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59588263] [2020-10-13 10:56:15,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:15,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:56:15,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395981201] [2020-10-13 10:56:15,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:56:15,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:56:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:56:15,882 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand 14 states. [2020-10-13 10:56:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:16,549 INFO L93 Difference]: Finished difference Result 175 states and 207 transitions. [2020-10-13 10:56:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:56:16,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-13 10:56:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:16,551 INFO L225 Difference]: With dead ends: 175 [2020-10-13 10:56:16,551 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:56:16,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:56:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:56:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2020-10-13 10:56:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 10:56:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2020-10-13 10:56:16,567 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 30 [2020-10-13 10:56:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:16,567 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2020-10-13 10:56:16,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:56:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2020-10-13 10:56:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:56:16,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:16,568 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:16,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:56:16,569 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:16,569 INFO L82 PathProgramCache]: Analyzing trace with hash 233933688, now seen corresponding path program 22 times [2020-10-13 10:56:16,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:16,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889006935] [2020-10-13 10:56:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:16,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:56:18,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:18,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1484 [2020-10-13 10:56:18,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:56:18,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:18,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:56:18,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:18,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:18,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:18,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:18,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:18,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:18,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:18,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:18,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889006935] [2020-10-13 10:56:18,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:18,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:56:18,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845835175] [2020-10-13 10:56:18,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:56:18,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:18,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:56:18,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:56:18,380 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 19 states. [2020-10-13 10:56:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:19,112 INFO L93 Difference]: Finished difference Result 158 states and 196 transitions. [2020-10-13 10:56:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:56:19,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-13 10:56:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:19,113 INFO L225 Difference]: With dead ends: 158 [2020-10-13 10:56:19,114 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:56:19,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:56:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:56:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-10-13 10:56:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 10:56:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2020-10-13 10:56:19,139 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 30 [2020-10-13 10:56:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:19,139 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2020-10-13 10:56:19,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:56:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2020-10-13 10:56:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:56:19,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:19,140 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:19,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:56:19,141 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1184546397, now seen corresponding path program 23 times [2020-10-13 10:56:19,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:19,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366463262] [2020-10-13 10:56:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:20,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:56:20,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,372 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-13 10:56:21,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:21,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:21,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:21,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:21,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:21,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:21,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:21,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:21,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:21,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:21,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:21,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366463262] [2020-10-13 10:56:21,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:21,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:56:21,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404679037] [2020-10-13 10:56:21,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:56:21,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:56:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:56:21,548 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 20 states. [2020-10-13 10:56:24,204 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-10-13 10:56:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:24,757 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2020-10-13 10:56:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:56:24,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-13 10:56:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:24,760 INFO L225 Difference]: With dead ends: 137 [2020-10-13 10:56:24,760 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 10:56:24,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:56:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 10:56:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 10:56:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:56:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2020-10-13 10:56:24,776 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 31 [2020-10-13 10:56:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:24,776 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2020-10-13 10:56:24,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:56:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2020-10-13 10:56:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:56:24,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:24,777 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:24,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:56:24,777 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 122266013, now seen corresponding path program 24 times [2020-10-13 10:56:24,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:24,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610515635] [2020-10-13 10:56:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:24,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:27,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:27,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:56:27,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:27,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2928 [2020-10-13 10:56:27,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:56:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:27,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:56:27,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:28,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:28,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:28,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:28,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:28,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:28,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:28,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:28,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:28,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610515635] [2020-10-13 10:56:28,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:28,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:56:28,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866673573] [2020-10-13 10:56:28,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:56:28,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:56:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:56:28,091 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 20 states. [2020-10-13 10:56:28,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:28,848 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2020-10-13 10:56:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:56:28,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-13 10:56:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:28,850 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:56:28,850 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:56:28,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:56:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:56:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2020-10-13 10:56:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 10:56:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-10-13 10:56:28,867 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 31 [2020-10-13 10:56:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:28,867 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-10-13 10:56:28,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:56:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-10-13 10:56:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:56:28,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:28,868 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:28,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:56:28,869 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash 955535384, now seen corresponding path program 25 times [2020-10-13 10:56:28,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:28,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979309543] [2020-10-13 10:56:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:28,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:30,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:31,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:31,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:56:31,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:31,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2225 [2020-10-13 10:56:31,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:31,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:56:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:31,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:56:31,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:31,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:31,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:31,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:31,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:31,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:31,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979309543] [2020-10-13 10:56:31,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:31,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:56:31,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035853791] [2020-10-13 10:56:31,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:56:31,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:31,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:56:31,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:56:31,496 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 21 states. [2020-10-13 10:56:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:32,369 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-10-13 10:56:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:56:32,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-13 10:56:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:32,371 INFO L225 Difference]: With dead ends: 172 [2020-10-13 10:56:32,371 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 10:56:32,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:56:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 10:56:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2020-10-13 10:56:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 10:56:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2020-10-13 10:56:32,389 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 32 [2020-10-13 10:56:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:32,390 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2020-10-13 10:56:32,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:56:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2020-10-13 10:56:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:56:32,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:32,391 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:32,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:56:32,391 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:32,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1836682865, now seen corresponding path program 26 times [2020-10-13 10:56:32,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:32,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821107182] [2020-10-13 10:56:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:32,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:36,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:36,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4432 [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:56:36,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:37,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:37,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:37,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:37,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:37,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:37,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:37,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:37,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:37,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:37,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:37,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 10:56:37,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821107182] [2020-10-13 10:56:37,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:37,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:56:37,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736990532] [2020-10-13 10:56:37,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:56:37,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:56:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:56:37,136 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand 16 states. [2020-10-13 10:56:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:38,045 INFO L93 Difference]: Finished difference Result 234 states and 273 transitions. [2020-10-13 10:56:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:56:38,046 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-13 10:56:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:38,048 INFO L225 Difference]: With dead ends: 234 [2020-10-13 10:56:38,048 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 10:56:38,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:56:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 10:56:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 136. [2020-10-13 10:56:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:56:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2020-10-13 10:56:38,065 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 33 [2020-10-13 10:56:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:38,065 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2020-10-13 10:56:38,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:56:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2020-10-13 10:56:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:56:38,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:38,066 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:38,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:56:38,067 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1017082109, now seen corresponding path program 27 times [2020-10-13 10:56:38,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:38,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571945324] [2020-10-13 10:56:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:38,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:40,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:40,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:56:40,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1966 [2020-10-13 10:56:40,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:56:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:56:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:40,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:40,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:40,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:40,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:40,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:40,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:40,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:40,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:40,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:40,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571945324] [2020-10-13 10:56:40,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:40,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:56:40,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918033560] [2020-10-13 10:56:40,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:56:40,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:56:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:56:40,449 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand 22 states. [2020-10-13 10:56:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:41,325 INFO L93 Difference]: Finished difference Result 202 states and 249 transitions. [2020-10-13 10:56:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:56:41,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-13 10:56:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:41,329 INFO L225 Difference]: With dead ends: 202 [2020-10-13 10:56:41,329 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 10:56:41,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:56:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 10:56:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 147. [2020-10-13 10:56:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 10:56:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-13 10:56:41,349 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 33 [2020-10-13 10:56:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:41,350 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-13 10:56:41,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:56:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-13 10:56:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:56:41,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:41,351 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:41,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:56:41,351 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:41,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1736065641, now seen corresponding path program 28 times [2020-10-13 10:56:41,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:41,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595088867] [2020-10-13 10:56:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:41,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1141 [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:56:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:42,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:56:42,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:43,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:43,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:43,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:43,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 10:56:43,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595088867] [2020-10-13 10:56:43,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:43,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:56:43,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378975231] [2020-10-13 10:56:43,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:56:43,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:43,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:56:43,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:56:43,164 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 21 states. [2020-10-13 10:56:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:47,000 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-13 10:56:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:56:47,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-10-13 10:56:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:47,002 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:56:47,003 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 10:56:47,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=163, Invalid=1907, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:56:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 10:56:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-13 10:56:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 10:56:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-10-13 10:56:47,027 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 34 [2020-10-13 10:56:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:47,027 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-10-13 10:56:47,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:56:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-10-13 10:56:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:56:47,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:47,028 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:47,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:56:47,029 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1369936712, now seen corresponding path program 29 times [2020-10-13 10:56:47,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:47,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364978479] [2020-10-13 10:56:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:47,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:47,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:49,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:49,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:56:49,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:49,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2681 [2020-10-13 10:56:49,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:56:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:49,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:56:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:50,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:50,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:50,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:50,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:50,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:50,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:50,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:50,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:50,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364978479] [2020-10-13 10:56:50,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:50,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:56:50,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841726170] [2020-10-13 10:56:50,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:56:50,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:56:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:56:50,203 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 23 states. [2020-10-13 10:56:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:51,232 INFO L93 Difference]: Finished difference Result 205 states and 253 transitions. [2020-10-13 10:56:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:56:51,233 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-13 10:56:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:51,235 INFO L225 Difference]: With dead ends: 205 [2020-10-13 10:56:51,235 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 10:56:51,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:56:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 10:56:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2020-10-13 10:56:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 10:56:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2020-10-13 10:56:51,276 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 34 [2020-10-13 10:56:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:51,277 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2020-10-13 10:56:51,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:56:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2020-10-13 10:56:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:56:51,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:51,282 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:51,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:56:51,282 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1941891165, now seen corresponding path program 30 times [2020-10-13 10:56:51,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:51,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95226019] [2020-10-13 10:56:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2100 [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:53,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:56:53,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:53,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:53,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:53,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:53,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:53,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:53,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:53,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:53,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95226019] [2020-10-13 10:56:53,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:53,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:56:53,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516852531] [2020-10-13 10:56:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:56:53,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:56:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:56:53,907 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand 24 states. [2020-10-13 10:56:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:55,007 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2020-10-13 10:56:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:56:55,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-13 10:56:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:55,009 INFO L225 Difference]: With dead ends: 217 [2020-10-13 10:56:55,009 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 10:56:55,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:56:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 10:56:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 160. [2020-10-13 10:56:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 10:56:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2020-10-13 10:56:55,027 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 35 [2020-10-13 10:56:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:55,028 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2020-10-13 10:56:55,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:56:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2020-10-13 10:56:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:56:55,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:55,029 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:55,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:56:55,029 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1901414169, now seen corresponding path program 31 times [2020-10-13 10:56:55,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:55,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064526835] [2020-10-13 10:56:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:55,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:55,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:56,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:59,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:59,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4556 [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:56:59,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:59,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:59,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:59,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:59,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:59,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:59,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:59,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:59,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:59,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:59,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:59,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:56:59,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064526835] [2020-10-13 10:56:59,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:59,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:56:59,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137253632] [2020-10-13 10:56:59,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:56:59,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:56:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:56:59,975 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand 18 states. [2020-10-13 10:57:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:01,238 INFO L93 Difference]: Finished difference Result 302 states and 349 transitions. [2020-10-13 10:57:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:57:01,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-13 10:57:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:01,241 INFO L225 Difference]: With dead ends: 302 [2020-10-13 10:57:01,241 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 10:57:01,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:57:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 10:57:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 172. [2020-10-13 10:57:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 10:57:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2020-10-13 10:57:01,261 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 36 [2020-10-13 10:57:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:01,261 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2020-10-13 10:57:01,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:57:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2020-10-13 10:57:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:57:01,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:01,262 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:01,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:57:01,263 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1529340248, now seen corresponding path program 32 times [2020-10-13 10:57:01,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:01,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109717349] [2020-10-13 10:57:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:01,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:57:04,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2954 [2020-10-13 10:57:04,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:57:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:04,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:57:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:04,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:04,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:04,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:04,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:57:04,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109717349] [2020-10-13 10:57:04,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:04,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:57:04,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079870332] [2020-10-13 10:57:04,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:57:04,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:57:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:57:04,799 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand 25 states. [2020-10-13 10:57:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:06,018 INFO L93 Difference]: Finished difference Result 251 states and 307 transitions. [2020-10-13 10:57:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:57:06,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-13 10:57:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:06,021 INFO L225 Difference]: With dead ends: 251 [2020-10-13 10:57:06,021 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 10:57:06,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:57:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 10:57:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 184. [2020-10-13 10:57:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:57:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2020-10-13 10:57:06,045 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 36 [2020-10-13 10:57:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:06,045 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2020-10-13 10:57:06,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:57:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2020-10-13 10:57:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:57:06,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:06,046 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:06,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:57:06,047 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash -152733987, now seen corresponding path program 33 times [2020-10-13 10:57:06,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:06,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507482869] [2020-10-13 10:57:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:06,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:06,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:07,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:57:07,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:08,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:08,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:08,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:08,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:08,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:08,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:57:08,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507482869] [2020-10-13 10:57:08,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:08,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:57:08,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617920524] [2020-10-13 10:57:08,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:57:08,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:08,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:57:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:57:08,136 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand 23 states. [2020-10-13 10:57:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:20,333 INFO L93 Difference]: Finished difference Result 209 states and 241 transitions. [2020-10-13 10:57:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:57:20,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2020-10-13 10:57:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:20,336 INFO L225 Difference]: With dead ends: 209 [2020-10-13 10:57:20,336 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 10:57:20,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=182, Invalid=2368, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 10:57:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 10:57:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-13 10:57:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 10:57:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 204 transitions. [2020-10-13 10:57:20,354 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 204 transitions. Word has length 37 [2020-10-13 10:57:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:20,354 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 204 transitions. [2020-10-13 10:57:20,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:57:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 204 transitions. [2020-10-13 10:57:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:57:20,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:20,355 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:20,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:57:20,355 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:20,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1625163709, now seen corresponding path program 34 times [2020-10-13 10:57:20,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:20,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336903209] [2020-10-13 10:57:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:20,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:20,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:23,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:23,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:57:23,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:23,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3358 [2020-10-13 10:57:23,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:23,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:57:23,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:23,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:57:23,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:24,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:24,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:24,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:24,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:24,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:24,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:24,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:24,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:57:24,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336903209] [2020-10-13 10:57:24,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:24,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:57:24,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064890878] [2020-10-13 10:57:24,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:57:24,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:57:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:57:24,462 INFO L87 Difference]: Start difference. First operand 174 states and 204 transitions. Second operand 26 states. [2020-10-13 10:57:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:25,742 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2020-10-13 10:57:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:57:25,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-13 10:57:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:25,744 INFO L225 Difference]: With dead ends: 254 [2020-10-13 10:57:25,744 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 10:57:25,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:57:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 10:57:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2020-10-13 10:57:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 10:57:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 218 transitions. [2020-10-13 10:57:25,762 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 218 transitions. Word has length 37 [2020-10-13 10:57:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:25,762 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 218 transitions. [2020-10-13 10:57:25,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:57:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 218 transitions. [2020-10-13 10:57:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:57:25,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:25,763 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:25,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:57:25,763 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:25,764 INFO L82 PathProgramCache]: Analyzing trace with hash 300723704, now seen corresponding path program 35 times [2020-10-13 10:57:25,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:25,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441198044] [2020-10-13 10:57:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:25,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:28,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:28,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:57:28,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3089 [2020-10-13 10:57:28,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:57:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:57:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:29,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:29,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:29,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:29,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:29,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:29,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:57:29,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441198044] [2020-10-13 10:57:29,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:29,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:57:29,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164150353] [2020-10-13 10:57:29,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:57:29,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:57:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:57:29,505 INFO L87 Difference]: Start difference. First operand 186 states and 218 transitions. Second operand 27 states. [2020-10-13 10:57:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:30,853 INFO L93 Difference]: Finished difference Result 267 states and 327 transitions. [2020-10-13 10:57:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:57:30,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-13 10:57:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:30,856 INFO L225 Difference]: With dead ends: 267 [2020-10-13 10:57:30,856 INFO L226 Difference]: Without dead ends: 228 [2020-10-13 10:57:30,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:57:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-13 10:57:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 198. [2020-10-13 10:57:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 10:57:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 232 transitions. [2020-10-13 10:57:30,883 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 232 transitions. Word has length 38 [2020-10-13 10:57:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:30,883 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 232 transitions. [2020-10-13 10:57:30,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:57:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 232 transitions. [2020-10-13 10:57:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:57:30,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:30,884 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:30,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:57:30,884 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1487784271, now seen corresponding path program 36 times [2020-10-13 10:57:30,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:30,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426047540] [2020-10-13 10:57:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:30,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:31,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:34,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:35,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:57:35,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:36,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:36,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:36,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 10:57:36,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426047540] [2020-10-13 10:57:36,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:36,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:57:36,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757861670] [2020-10-13 10:57:36,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:57:36,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:57:36,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:57:36,372 INFO L87 Difference]: Start difference. First operand 198 states and 232 transitions. Second operand 20 states. [2020-10-13 10:57:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:38,056 INFO L93 Difference]: Finished difference Result 379 states and 434 transitions. [2020-10-13 10:57:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:57:38,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-13 10:57:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:38,059 INFO L225 Difference]: With dead ends: 379 [2020-10-13 10:57:38,059 INFO L226 Difference]: Without dead ends: 243 [2020-10-13 10:57:38,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:57:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-13 10:57:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 212. [2020-10-13 10:57:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 10:57:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2020-10-13 10:57:38,088 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 39 [2020-10-13 10:57:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:38,088 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2020-10-13 10:57:38,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:57:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2020-10-13 10:57:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:57:38,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:38,089 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:38,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:57:38,090 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2102210787, now seen corresponding path program 37 times [2020-10-13 10:57:38,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:38,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690872363] [2020-10-13 10:57:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:38,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:38,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:42,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4893 [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:57:43,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:43,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:43,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:43,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:43,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:43,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:43,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:43,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:43,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:57:43,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690872363] [2020-10-13 10:57:43,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:43,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:57:43,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667901186] [2020-10-13 10:57:43,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:57:43,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:57:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:57:43,904 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand 28 states. [2020-10-13 10:57:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:45,868 INFO L93 Difference]: Finished difference Result 305 states and 370 transitions. [2020-10-13 10:57:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:57:45,869 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-13 10:57:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:45,871 INFO L225 Difference]: With dead ends: 305 [2020-10-13 10:57:45,871 INFO L226 Difference]: Without dead ends: 257 [2020-10-13 10:57:45,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:57:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-13 10:57:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 225. [2020-10-13 10:57:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-13 10:57:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 262 transitions. [2020-10-13 10:57:45,903 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 262 transitions. Word has length 39 [2020-10-13 10:57:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:45,903 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 262 transitions. [2020-10-13 10:57:45,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:57:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 262 transitions. [2020-10-13 10:57:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:57:45,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:45,905 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:45,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:57:45,905 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash -232195479, now seen corresponding path program 38 times [2020-10-13 10:57:45,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:45,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829697932] [2020-10-13 10:57:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:45,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:47,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:47,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:57:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:49,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:49,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:49,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:49,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:49,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:49,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:49,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:49,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:57:49,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829697932] [2020-10-13 10:57:49,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:49,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:57:49,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364991250] [2020-10-13 10:57:49,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:57:49,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:57:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:57:49,469 INFO L87 Difference]: Start difference. First operand 225 states and 262 transitions. Second operand 26 states. [2020-10-13 10:57:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:51,067 INFO L93 Difference]: Finished difference Result 254 states and 291 transitions. [2020-10-13 10:57:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:57:51,068 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2020-10-13 10:57:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:51,070 INFO L225 Difference]: With dead ends: 254 [2020-10-13 10:57:51,070 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 10:57:51,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:57:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 10:57:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 10:57:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 10:57:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 249 transitions. [2020-10-13 10:57:51,098 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 249 transitions. Word has length 40 [2020-10-13 10:57:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:51,098 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 249 transitions. [2020-10-13 10:57:51,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:57:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 249 transitions. [2020-10-13 10:57:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:57:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:51,099 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:51,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:57:51,100 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash 716231320, now seen corresponding path program 39 times [2020-10-13 10:57:51,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:51,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949507948] [2020-10-13 10:57:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:51,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:51,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:56,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:56,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:57:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:57,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:57,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:57,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:57:57,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949507948] [2020-10-13 10:57:57,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:57,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:57:57,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094905030] [2020-10-13 10:57:57,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:57:57,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:57:57,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:57:57,173 INFO L87 Difference]: Start difference. First operand 214 states and 249 transitions. Second operand 29 states. [2020-10-13 10:57:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:59,062 INFO L93 Difference]: Finished difference Result 308 states and 374 transitions. [2020-10-13 10:57:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:57:59,063 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-13 10:57:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:59,066 INFO L225 Difference]: With dead ends: 308 [2020-10-13 10:57:59,066 INFO L226 Difference]: Without dead ends: 260 [2020-10-13 10:57:59,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:57:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-13 10:57:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 227. [2020-10-13 10:57:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 10:57:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 264 transitions. [2020-10-13 10:57:59,088 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 264 transitions. Word has length 40 [2020-10-13 10:57:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:59,088 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 264 transitions. [2020-10-13 10:57:59,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:57:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 264 transitions. [2020-10-13 10:57:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:57:59,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:59,089 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:59,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:57:59,090 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2106376579, now seen corresponding path program 40 times [2020-10-13 10:57:59,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:59,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028219463] [2020-10-13 10:57:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:59,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:59,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:02,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:04,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:04,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:58:04,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:04,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 10:58:04,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:58:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:58:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:58:04,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:04,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:04,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:04,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:04,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:58:04,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:58:04,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028219463] [2020-10-13 10:58:04,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:04,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:58:04,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055794119] [2020-10-13 10:58:04,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:58:04,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:58:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:58:04,903 INFO L87 Difference]: Start difference. First operand 227 states and 264 transitions. Second operand 30 states. [2020-10-13 10:58:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:06,655 INFO L93 Difference]: Finished difference Result 322 states and 391 transitions. [2020-10-13 10:58:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:58:06,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-13 10:58:06,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:06,657 INFO L225 Difference]: With dead ends: 322 [2020-10-13 10:58:06,657 INFO L226 Difference]: Without dead ends: 274 [2020-10-13 10:58:06,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:58:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-13 10:58:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 240. [2020-10-13 10:58:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-13 10:58:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 279 transitions. [2020-10-13 10:58:06,687 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 279 transitions. Word has length 41 [2020-10-13 10:58:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:06,687 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 279 transitions. [2020-10-13 10:58:06,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:58:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 279 transitions. [2020-10-13 10:58:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:58:06,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:06,688 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:06,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:58:06,688 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash -174086439, now seen corresponding path program 41 times [2020-10-13 10:58:06,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:06,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888018543] [2020-10-13 10:58:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:06,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:11,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:58:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:58:11,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:12,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:12,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:12,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:12,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:12,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:12,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:12,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:12,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:12,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:12,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:12,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 10:58:12,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888018543] [2020-10-13 10:58:12,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:12,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:58:12,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31471325] [2020-10-13 10:58:12,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:58:12,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:12,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:58:12,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:58:12,289 INFO L87 Difference]: Start difference. First operand 240 states and 279 transitions. Second operand 22 states. [2020-10-13 10:58:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:14,522 INFO L93 Difference]: Finished difference Result 464 states and 527 transitions. [2020-10-13 10:58:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 10:58:14,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-13 10:58:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:14,525 INFO L225 Difference]: With dead ends: 464 [2020-10-13 10:58:14,525 INFO L226 Difference]: Without dead ends: 293 [2020-10-13 10:58:14,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=153, Invalid=2297, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 10:58:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-13 10:58:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 256. [2020-10-13 10:58:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 10:58:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 296 transitions. [2020-10-13 10:58:14,558 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 296 transitions. Word has length 42 [2020-10-13 10:58:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:14,558 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 296 transitions. [2020-10-13 10:58:14,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:58:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 296 transitions. [2020-10-13 10:58:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:58:14,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:14,560 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:14,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:58:14,560 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:14,560 INFO L82 PathProgramCache]: Analyzing trace with hash 587091768, now seen corresponding path program 42 times [2020-10-13 10:58:14,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:14,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011094179] [2020-10-13 10:58:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:14,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:18,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3818 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:58:18,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:19,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:19,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:19,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:19,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:19,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:19,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:19,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:19,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:58:19,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011094179] [2020-10-13 10:58:19,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:19,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:58:19,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422031330] [2020-10-13 10:58:19,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:58:19,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:19,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:58:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:58:19,281 INFO L87 Difference]: Start difference. First operand 256 states and 296 transitions. Second operand 31 states. [2020-10-13 10:58:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:21,119 INFO L93 Difference]: Finished difference Result 364 states and 438 transitions. [2020-10-13 10:58:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:58:21,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-13 10:58:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:21,122 INFO L225 Difference]: With dead ends: 364 [2020-10-13 10:58:21,122 INFO L226 Difference]: Without dead ends: 306 [2020-10-13 10:58:21,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:58:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-13 10:58:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 270. [2020-10-13 10:58:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-13 10:58:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 312 transitions. [2020-10-13 10:58:21,156 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 312 transitions. Word has length 42 [2020-10-13 10:58:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:21,156 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 312 transitions. [2020-10-13 10:58:21,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:58:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 312 transitions. [2020-10-13 10:58:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:58:21,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:21,157 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:21,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:58:21,158 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash -312545443, now seen corresponding path program 43 times [2020-10-13 10:58:21,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:21,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345312061] [2020-10-13 10:58:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:21,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:21,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:23,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:23,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:58:23,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:23,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-13 10:58:23,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:23,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:58:23,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:58:23,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:58:23,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:24,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:24,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:24,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:24,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:24,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:24,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:24,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:24,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 10:58:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 10:58:24,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345312061] [2020-10-13 10:58:24,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:24,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:58:24,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616262998] [2020-10-13 10:58:24,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:58:24,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:24,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:58:24,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:58:24,692 INFO L87 Difference]: Start difference. First operand 270 states and 312 transitions. Second operand 27 states. [2020-10-13 10:58:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:27,451 INFO L93 Difference]: Finished difference Result 299 states and 341 transitions. [2020-10-13 10:58:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 10:58:27,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 43 [2020-10-13 10:58:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:27,454 INFO L225 Difference]: With dead ends: 299 [2020-10-13 10:58:27,454 INFO L226 Difference]: Without dead ends: 258 [2020-10-13 10:58:27,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=220, Invalid=3440, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 10:58:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-13 10:58:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-13 10:58:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 10:58:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 298 transitions. [2020-10-13 10:58:27,486 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 298 transitions. Word has length 43 [2020-10-13 10:58:27,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:27,486 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 298 transitions. [2020-10-13 10:58:27,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:58:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 298 transitions. [2020-10-13 10:58:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:58:27,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:27,487 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:27,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:58:27,487 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1814735395, now seen corresponding path program 44 times [2020-10-13 10:58:27,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:27,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79057798] [2020-10-13 10:58:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:27,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:28,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:30,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:32,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4617 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:58:32,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:33,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:33,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:33,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:33,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:33,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:33,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:58:33,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:33,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:33,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:33,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:33,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:58:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:58:33,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79057798] [2020-10-13 10:58:33,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:33,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:58:33,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97534869] [2020-10-13 10:58:33,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:58:33,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:58:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:58:33,115 INFO L87 Difference]: Start difference. First operand 258 states and 298 transitions. Second operand 32 states. [2020-10-13 10:58:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:35,330 INFO L93 Difference]: Finished difference Result 367 states and 442 transitions. [2020-10-13 10:58:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:58:35,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-13 10:58:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:35,333 INFO L225 Difference]: With dead ends: 367 [2020-10-13 10:58:35,333 INFO L226 Difference]: Without dead ends: 309 [2020-10-13 10:58:35,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:58:35,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-13 10:58:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 272. [2020-10-13 10:58:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-13 10:58:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 314 transitions. [2020-10-13 10:58:35,368 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 314 transitions. Word has length 43 [2020-10-13 10:58:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:35,368 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 314 transitions. [2020-10-13 10:58:35,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:58:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 314 transitions. [2020-10-13 10:58:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:58:35,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:35,369 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:35,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:58:35,369 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1038033880, now seen corresponding path program 45 times [2020-10-13 10:58:35,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:35,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736644968] [2020-10-13 10:58:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:35,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:35,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:37,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:58:40,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:58:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:58:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:41,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:41,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:41,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:41,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:41,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:41,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:41,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:41,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:41,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:58:41,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736644968] [2020-10-13 10:58:41,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:41,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:58:41,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5564547] [2020-10-13 10:58:41,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:58:41,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:41,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:58:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:58:41,417 INFO L87 Difference]: Start difference. First operand 272 states and 314 transitions. Second operand 33 states. [2020-10-13 10:58:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:43,711 INFO L93 Difference]: Finished difference Result 382 states and 460 transitions. [2020-10-13 10:58:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:58:43,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-13 10:58:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:43,714 INFO L225 Difference]: With dead ends: 382 [2020-10-13 10:58:43,714 INFO L226 Difference]: Without dead ends: 324 [2020-10-13 10:58:43,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=1387, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:58:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-13 10:58:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 286. [2020-10-13 10:58:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 10:58:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 330 transitions. [2020-10-13 10:58:43,741 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 330 transitions. Word has length 44 [2020-10-13 10:58:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:43,742 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 330 transitions. [2020-10-13 10:58:43,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:58:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 330 transitions. [2020-10-13 10:58:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:58:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:43,742 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:43,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:58:43,743 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1473065231, now seen corresponding path program 46 times [2020-10-13 10:58:43,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:43,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430024681] [2020-10-13 10:58:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:43,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:43,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:48,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:48,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:58:48,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:55,611 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-13 10:59:11,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:11,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:11,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:11,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:11,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:11,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:11,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:11,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:11,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:11,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:11,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 18 proven. 101 refuted. 2 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 10:59:11,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430024681] [2020-10-13 10:59:11,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:11,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:59:11,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305192204] [2020-10-13 10:59:11,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:59:11,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:59:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=488, Unknown=5, NotChecked=0, Total=552 [2020-10-13 10:59:11,144 INFO L87 Difference]: Start difference. First operand 286 states and 330 transitions. Second operand 24 states. [2020-10-13 10:59:17,267 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-10-13 10:59:18,320 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28