/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:59:04,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:59:04,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:59:04,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:59:04,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:59:04,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:59:04,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:59:04,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:59:04,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:59:04,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:59:04,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:59:04,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:59:04,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:59:04,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:59:04,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:59:04,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:59:04,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:59:04,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:59:04,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:59:04,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:59:04,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:59:04,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:59:04,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:59:04,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:59:04,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:59:04,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:59:04,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:59:04,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:59:04,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:59:04,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:59:04,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:59:04,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:59:04,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:59:04,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:59:04,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:59:04,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:59:04,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:59:04,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:59:04,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:59:04,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:59:04,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:59:04,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:59:04,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:59:04,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:59:04,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:59:04,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:59:04,213 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:59:04,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:59:04,213 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:59:04,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:59:04,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:59:04,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:59:04,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:59:04,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:59:04,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:59:04,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:59:04,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:59:04,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:59:04,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:59:04,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:59:04,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:59:04,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:59:04,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:59:04,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:59:04,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:59:04,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:59:04,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:59:04,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:59:04,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:59:04,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:59:04,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:59:04,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:59:04,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:59:04,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:59:04,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:59:04,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:59:04,541 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:59:04,542 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2020-10-12 09:59:04,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8fe366c8/da06061f6e0546fa8ae2d826999ab92e/FLAG25babe84f [2020-10-12 09:59:05,075 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:59:05,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2020-10-12 09:59:05,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8fe366c8/da06061f6e0546fa8ae2d826999ab92e/FLAG25babe84f [2020-10-12 09:59:05,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8fe366c8/da06061f6e0546fa8ae2d826999ab92e [2020-10-12 09:59:05,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:59:05,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:59:05,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:05,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:59:05,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:59:05,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d8d2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05, skipping insertion in model container [2020-10-12 09:59:05,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:59:05,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:59:05,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:05,704 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:59:05,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:05,826 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:59:05,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05 WrapperNode [2020-10-12 09:59:05,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:05,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:59:05,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:59:05,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:59:05,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... [2020-10-12 09:59:05,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:59:05,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:59:05,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:59:05,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:59:05,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:59:06,282 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:59:06,282 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-12 09:59:06,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:06 BoogieIcfgContainer [2020-10-12 09:59:06,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:59:06,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:59:06,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:59:06,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:59:06,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:59:05" (1/3) ... [2020-10-12 09:59:06,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b310ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:06, skipping insertion in model container [2020-10-12 09:59:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:05" (2/3) ... [2020-10-12 09:59:06,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b310ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:06, skipping insertion in model container [2020-10-12 09:59:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:06" (3/3) ... [2020-10-12 09:59:06,301 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2020-10-12 09:59:06,312 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:59:06,318 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:59:06,331 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:59:06,352 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:59:06,352 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:59:06,352 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:59:06,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:59:06,353 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:59:06,353 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:59:06,353 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:59:06,353 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:59:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 09:59:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:59:06,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:06,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:06,383 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1916738342, now seen corresponding path program 1 times [2020-10-12 09:59:06,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:06,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963686562] [2020-10-12 09:59:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:08,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:59:08,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:59:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1878 [2020-10-12 09:59:08,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:08,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:59:08,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:08,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:59:08,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:59:08,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:08,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:08,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:08,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963686562] [2020-10-12 09:59:08,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:59:08,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:59:08,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749060295] [2020-10-12 09:59:08,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:59:08,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:59:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:08,536 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-12 09:59:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:08,802 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-10-12 09:59:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:59:08,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-12 09:59:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:08,820 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:59:08,820 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:59:08,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:59:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:59:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:59:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-12 09:59:08,879 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-12 09:59:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:08,879 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-12 09:59:08,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:59:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-12 09:59:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:59:08,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:08,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:08,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:59:08,884 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1167956326, now seen corresponding path program 1 times [2020-10-12 09:59:08,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:08,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263037453] [2020-10-12 09:59:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:08,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:13,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:59:13,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:59:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:59:13,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:59:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:59:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:13,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:13,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:13,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:13,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:13,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:13,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:13,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:59:13,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263037453] [2020-10-12 09:59:13,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:13,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:59:13,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289798167] [2020-10-12 09:59:13,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:59:13,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:13,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:59:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:13,966 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-12 09:59:14,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:14,135 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2020-10-12 09:59:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:59:14,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-12 09:59:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:14,137 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:59:14,138 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:59:14,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:59:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 09:59:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:59:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-12 09:59:14,149 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2020-10-12 09:59:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:14,150 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-12 09:59:14,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:59:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-12 09:59:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:59:14,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:14,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:14,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:59:14,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1255820446, now seen corresponding path program 2 times [2020-10-12 09:59:14,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:14,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008159464] [2020-10-12 09:59:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:14,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:14,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:14,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:14,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:19,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:59:19,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:19,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:59:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:59:19,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:19,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:19,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:19,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:19,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:19,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:59:19,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:19,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:19,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:19,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:59:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 09:59:19,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008159464] [2020-10-12 09:59:19,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:19,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:59:19,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809713811] [2020-10-12 09:59:19,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:59:19,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:59:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:19,256 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-10-12 09:59:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:19,569 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-10-12 09:59:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:59:19,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-12 09:59:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:19,574 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:59:19,574 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:59:19,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:59:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 09:59:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:59:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-12 09:59:19,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2020-10-12 09:59:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:19,598 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-12 09:59:19,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:59:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-12 09:59:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:59:19,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:19,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:19,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:19,606 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2017193242, now seen corresponding path program 3 times [2020-10-12 09:59:19,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:19,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352171682] [2020-10-12 09:59:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:24,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:59:24,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:24,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:59:24,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:59:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:59:24,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:59:24,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:24,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:24,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:24,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:24,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:24,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:24,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 09:59:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-12 09:59:24,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352171682] [2020-10-12 09:59:24,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:24,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:59:24,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311397181] [2020-10-12 09:59:24,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:59:24,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:59:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:24,723 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 7 states. [2020-10-12 09:59:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:24,952 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-12 09:59:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:59:24,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-12 09:59:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:24,954 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:59:24,954 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:59:24,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:59:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 09:59:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 09:59:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-12 09:59:24,974 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2020-10-12 09:59:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:24,975 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-12 09:59:24,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:59:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-12 09:59:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:59:24,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:24,977 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:24,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:24,977 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash 544374558, now seen corresponding path program 4 times [2020-10-12 09:59:24,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:24,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086448515] [2020-10-12 09:59:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:25,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:30,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:59:30,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:59:30,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:59:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:30,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:30,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:30,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:30,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:30,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:30,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:30,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:59:30,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086448515] [2020-10-12 09:59:30,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:30,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:59:30,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356311903] [2020-10-12 09:59:30,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:59:30,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:59:30,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:30,116 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 8 states. [2020-10-12 09:59:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:30,408 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-10-12 09:59:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:59:30,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-12 09:59:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:30,410 INFO L225 Difference]: With dead ends: 125 [2020-10-12 09:59:30,411 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:59:30,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:59:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 09:59:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 09:59:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-12 09:59:30,438 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2020-10-12 09:59:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:30,438 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-12 09:59:30,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:59:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-12 09:59:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 09:59:30,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:30,443 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:30,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:30,443 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 325227418, now seen corresponding path program 5 times [2020-10-12 09:59:30,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:30,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350699421] [2020-10-12 09:59:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:30,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:59:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:59:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:59:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 09:59:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:59:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:35,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:35,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:35,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:35,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:35,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:35,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:35,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:59:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-12 09:59:35,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350699421] [2020-10-12 09:59:35,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:35,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:59:35,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143879879] [2020-10-12 09:59:35,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:59:35,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:35,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:59:35,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:35,603 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 9 states. [2020-10-12 09:59:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:35,846 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-10-12 09:59:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:59:35,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-12 09:59:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:35,848 INFO L225 Difference]: With dead ends: 140 [2020-10-12 09:59:35,848 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:59:35,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:59:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-12 09:59:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 09:59:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-12 09:59:35,868 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2020-10-12 09:59:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:35,868 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-12 09:59:35,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:59:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-12 09:59:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 09:59:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:35,870 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:35,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:35,870 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1206981022, now seen corresponding path program 6 times [2020-10-12 09:59:35,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:35,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003867780] [2020-10-12 09:59:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:35,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:40,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:40,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:59:40,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:40,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:40,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:40,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:59:40,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:40,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:59:40,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:40,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:40,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:40,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:40,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:40,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:40,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:40,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-12 09:59:40,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003867780] [2020-10-12 09:59:40,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:40,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:59:40,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854833681] [2020-10-12 09:59:40,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:59:40,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:59:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:40,989 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 10 states. [2020-10-12 09:59:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:41,196 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2020-10-12 09:59:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:59:41,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-12 09:59:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:41,197 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:59:41,197 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:59:41,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:59:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 09:59:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:59:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-10-12 09:59:41,221 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2020-10-12 09:59:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:41,221 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-10-12 09:59:41,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:59:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-10-12 09:59:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:59:41,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:41,223 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:41,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:41,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:41,224 INFO L82 PathProgramCache]: Analyzing trace with hash 192305690, now seen corresponding path program 7 times [2020-10-12 09:59:41,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:41,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606195420] [2020-10-12 09:59:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:46,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:46,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:59:46,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:46,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:59:46,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:46,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:59:46,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 09:59:46,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:59:46,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:46,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:46,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:46,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:46,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:46,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:46,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:46,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:46,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-12 09:59:46,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606195420] [2020-10-12 09:59:46,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:46,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:59:46,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830272175] [2020-10-12 09:59:46,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:59:46,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:59:46,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:46,343 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 11 states. [2020-10-12 09:59:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:46,559 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2020-10-12 09:59:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:59:46,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-12 09:59:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:46,561 INFO L225 Difference]: With dead ends: 170 [2020-10-12 09:59:46,561 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:59:46,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:59:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-12 09:59:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 09:59:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-12 09:59:46,579 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2020-10-12 09:59:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:46,580 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-12 09:59:46,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:59:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-12 09:59:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 09:59:46,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:46,584 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:46,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:46,590 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:46,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:46,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1640627170, now seen corresponding path program 8 times [2020-10-12 09:59:46,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:46,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572635538] [2020-10-12 09:59:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:46,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:46,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:46,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:46,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:46,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:47,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:51,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:51,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:59:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:51,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:51,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:51,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:51,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:51,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:51,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:51,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:51,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-12 09:59:51,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572635538] [2020-10-12 09:59:51,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:51,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:59:51,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876677323] [2020-10-12 09:59:51,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:59:51,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:51,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:59:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:51,757 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 12 states. [2020-10-12 09:59:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:52,038 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2020-10-12 09:59:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:59:52,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-10-12 09:59:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:52,040 INFO L225 Difference]: With dead ends: 185 [2020-10-12 09:59:52,040 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:59:52,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:59:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-12 09:59:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 09:59:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-10-12 09:59:52,055 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2020-10-12 09:59:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:52,055 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-10-12 09:59:52,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:59:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-10-12 09:59:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 09:59:52,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:52,061 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:52,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:52,061 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash -32030566, now seen corresponding path program 9 times [2020-10-12 09:59:52,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:52,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438135469] [2020-10-12 09:59:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:52,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:57,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 09:59:57,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:57,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:59:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-12 09:59:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 09:59:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:57,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:57,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:57,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:57,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:57,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:57,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:57,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:57,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:57,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:57,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-12 09:59:57,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438135469] [2020-10-12 09:59:57,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:57,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:59:57,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353687453] [2020-10-12 09:59:57,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:59:57,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:59:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:57,238 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 13 states. [2020-10-12 09:59:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:57,518 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2020-10-12 09:59:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:59:57,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-10-12 09:59:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:57,519 INFO L225 Difference]: With dead ends: 200 [2020-10-12 09:59:57,519 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:59:57,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:59:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-12 09:59:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 09:59:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-10-12 09:59:57,537 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 99 [2020-10-12 09:59:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:57,539 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-10-12 09:59:57,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:59:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-10-12 09:59:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 09:59:57,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:57,542 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:57,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:59:57,543 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 35739294, now seen corresponding path program 10 times [2020-10-12 09:59:57,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:57,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350248720] [2020-10-12 09:59:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:57,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:57,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:00:02,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 10:00:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:00:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:02,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:02,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:02,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:02,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:02,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:02,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:02,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-12 10:00:02,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350248720] [2020-10-12 10:00:02,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:02,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:00:02,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258596500] [2020-10-12 10:00:02,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:00:02,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:00:02,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:02,738 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 14 states. [2020-10-12 10:00:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:03,080 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2020-10-12 10:00:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:00:03,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-12 10:00:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:03,082 INFO L225 Difference]: With dead ends: 215 [2020-10-12 10:00:03,082 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 10:00:03,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 10:00:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-12 10:00:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 10:00:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2020-10-12 10:00:03,098 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 107 [2020-10-12 10:00:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:03,099 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2020-10-12 10:00:03,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:00:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2020-10-12 10:00:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 10:00:03,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:03,102 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:03,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:00:03,103 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1494923494, now seen corresponding path program 11 times [2020-10-12 10:00:03,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:03,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288675025] [2020-10-12 10:00:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:08,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-12 10:00:08,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:08,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:00:08,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:00:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 10:00:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:00:08,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:08,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:08,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:08,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:08,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:08,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:08,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-12 10:00:08,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288675025] [2020-10-12 10:00:08,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:08,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:00:08,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133269554] [2020-10-12 10:00:08,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:00:08,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:00:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:08,313 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 15 states. [2020-10-12 10:00:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:08,643 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2020-10-12 10:00:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:00:08,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-10-12 10:00:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:08,645 INFO L225 Difference]: With dead ends: 230 [2020-10-12 10:00:08,645 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 10:00:08,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 10:00:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-12 10:00:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 10:00:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2020-10-12 10:00:08,653 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 115 [2020-10-12 10:00:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:08,653 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2020-10-12 10:00:08,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:00:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2020-10-12 10:00:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 10:00:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:08,655 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:08,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:00:08,655 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1418922270, now seen corresponding path program 12 times [2020-10-12 10:00:08,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:08,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334110487] [2020-10-12 10:00:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:08,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:08,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:13,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:00:13,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:13,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:13,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:13,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:13,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:13,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:13,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:13,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:13,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:13,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:13,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-12 10:00:13,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334110487] [2020-10-12 10:00:13,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:13,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:00:13,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716266880] [2020-10-12 10:00:13,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:00:13,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:00:13,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:13,852 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand 16 states. [2020-10-12 10:00:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:14,183 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2020-10-12 10:00:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:00:14,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-10-12 10:00:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:14,185 INFO L225 Difference]: With dead ends: 245 [2020-10-12 10:00:14,186 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:00:14,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:00:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-12 10:00:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 10:00:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2020-10-12 10:00:14,195 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 123 [2020-10-12 10:00:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:14,196 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2020-10-12 10:00:14,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:00:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2020-10-12 10:00:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-12 10:00:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:14,197 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:14,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:14,197 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash -545231462, now seen corresponding path program 13 times [2020-10-12 10:00:14,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:14,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656291236] [2020-10-12 10:00:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:14,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:19,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:19,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-12 10:00:19,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:00:19,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:00:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-12 10:00:19,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:00:19,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:00:19,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:19,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:19,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:19,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2020-10-12 10:00:19,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656291236] [2020-10-12 10:00:19,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:19,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:00:19,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979125609] [2020-10-12 10:00:19,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:00:19,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:00:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:19,422 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand 17 states. [2020-10-12 10:00:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:19,817 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2020-10-12 10:00:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:00:19,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-10-12 10:00:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:19,820 INFO L225 Difference]: With dead ends: 260 [2020-10-12 10:00:19,820 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 10:00:19,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 10:00:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-12 10:00:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 10:00:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-12 10:00:19,829 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 131 [2020-10-12 10:00:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:19,829 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-12 10:00:19,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:00:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-12 10:00:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 10:00:19,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:19,831 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:19,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:19,832 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2020285342, now seen corresponding path program 14 times [2020-10-12 10:00:19,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:19,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523568006] [2020-10-12 10:00:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:19,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:24,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 10:00:24,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:24,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:00:24,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:24,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:00:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-12 10:00:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:00:24,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:25,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:25,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:25,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:25,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:25,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:25,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:25,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:25,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:25,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2020-10-12 10:00:25,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523568006] [2020-10-12 10:00:25,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:25,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:00:25,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358136655] [2020-10-12 10:00:25,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:00:25,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:00:25,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:25,079 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 18 states. [2020-10-12 10:00:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:25,475 INFO L93 Difference]: Finished difference Result 275 states and 298 transitions. [2020-10-12 10:00:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:00:25,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-10-12 10:00:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:25,477 INFO L225 Difference]: With dead ends: 275 [2020-10-12 10:00:25,477 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 10:00:25,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 10:00:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-12 10:00:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 10:00:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2020-10-12 10:00:25,491 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 139 [2020-10-12 10:00:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:25,491 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2020-10-12 10:00:25,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:00:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2020-10-12 10:00:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-12 10:00:25,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:25,493 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:25,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:25,494 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1618430950, now seen corresponding path program 15 times [2020-10-12 10:00:25,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:25,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263468620] [2020-10-12 10:00:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:25,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:30,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 10:00:30,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:30,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 10:00:30,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 10:00:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:00:30,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:30,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:30,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:30,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-12 10:00:30,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263468620] [2020-10-12 10:00:30,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:30,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:30,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750182057] [2020-10-12 10:00:30,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:30,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:30,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:30,756 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand 19 states. [2020-10-12 10:00:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:31,149 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2020-10-12 10:00:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:00:31,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-10-12 10:00:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:31,151 INFO L225 Difference]: With dead ends: 290 [2020-10-12 10:00:31,151 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 10:00:31,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 10:00:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-12 10:00:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 10:00:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2020-10-12 10:00:31,160 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 147 [2020-10-12 10:00:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:31,160 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2020-10-12 10:00:31,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2020-10-12 10:00:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 10:00:31,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:31,162 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:31,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:31,162 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1384746526, now seen corresponding path program 16 times [2020-10-12 10:00:31,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:31,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899502646] [2020-10-12 10:00:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:31,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:36,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:00:36,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:36,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:36,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:36,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:36,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2020-10-12 10:00:36,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899502646] [2020-10-12 10:00:36,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:36,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:36,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985429093] [2020-10-12 10:00:36,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:36,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:36,452 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand 20 states. [2020-10-12 10:00:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:36,901 INFO L93 Difference]: Finished difference Result 305 states and 328 transitions. [2020-10-12 10:00:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:36,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 155 [2020-10-12 10:00:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:36,903 INFO L225 Difference]: With dead ends: 305 [2020-10-12 10:00:36,904 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 10:00:36,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 10:00:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-12 10:00:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-12 10:00:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2020-10-12 10:00:36,913 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 155 [2020-10-12 10:00:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:36,914 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2020-10-12 10:00:36,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2020-10-12 10:00:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-12 10:00:36,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:36,915 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:36,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:36,916 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash -56747366, now seen corresponding path program 17 times [2020-10-12 10:00:36,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:36,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188106947] [2020-10-12 10:00:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:36,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:00:41,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:42,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:42,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:42,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:42,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:42,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:42,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-12 10:00:42,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188106947] [2020-10-12 10:00:42,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:42,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:00:42,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964194991] [2020-10-12 10:00:42,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:00:42,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:42,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:00:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:42,235 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand 21 states. [2020-10-12 10:00:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:42,652 INFO L93 Difference]: Finished difference Result 320 states and 343 transitions. [2020-10-12 10:00:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:00:42,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 163 [2020-10-12 10:00:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:42,654 INFO L225 Difference]: With dead ends: 320 [2020-10-12 10:00:42,655 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 10:00:42,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 10:00:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-12 10:00:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 10:00:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2020-10-12 10:00:42,664 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 163 [2020-10-12 10:00:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:42,664 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2020-10-12 10:00:42,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:00:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2020-10-12 10:00:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-12 10:00:42,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:42,666 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:42,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:42,667 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash -909221730, now seen corresponding path program 18 times [2020-10-12 10:00:42,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:42,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7741991] [2020-10-12 10:00:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:00:47,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-12 10:00:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:00:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:47,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:47,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:47,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:47,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2020-10-12 10:00:48,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7741991] [2020-10-12 10:00:48,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:48,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:48,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558706244] [2020-10-12 10:00:48,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:48,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:48,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:48,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:48,007 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand 22 states. [2020-10-12 10:00:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:48,502 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2020-10-12 10:00:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:48,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 171 [2020-10-12 10:00:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:48,505 INFO L225 Difference]: With dead ends: 335 [2020-10-12 10:00:48,505 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 10:00:48,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 10:00:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-12 10:00:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 10:00:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2020-10-12 10:00:48,514 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 171 [2020-10-12 10:00:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:48,515 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2020-10-12 10:00:48,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2020-10-12 10:00:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-12 10:00:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:48,516 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:48,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:48,517 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 710975770, now seen corresponding path program 19 times [2020-10-12 10:00:48,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:48,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201114721] [2020-10-12 10:00:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:53,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-12 10:00:53,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:00:53,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:53,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:53,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:53,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:53,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:53,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:53,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2020-10-12 10:00:53,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201114721] [2020-10-12 10:00:53,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:53,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:53,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475584296] [2020-10-12 10:00:53,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:53,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:53,876 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand 23 states. [2020-10-12 10:00:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:54,324 INFO L93 Difference]: Finished difference Result 350 states and 373 transitions. [2020-10-12 10:00:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:00:54,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 179 [2020-10-12 10:00:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:54,326 INFO L225 Difference]: With dead ends: 350 [2020-10-12 10:00:54,326 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 10:00:54,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 10:00:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-12 10:00:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 10:00:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2020-10-12 10:00:54,337 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 179 [2020-10-12 10:00:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:54,337 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2020-10-12 10:00:54,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2020-10-12 10:00:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-12 10:00:54,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:54,339 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:54,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:54,340 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash -954625250, now seen corresponding path program 20 times [2020-10-12 10:00:54,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:54,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309523815] [2020-10-12 10:00:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:00:59,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:59,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:59,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-12 10:00:59,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309523815] [2020-10-12 10:00:59,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:59,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:00:59,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620239376] [2020-10-12 10:00:59,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:00:59,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:00:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:00:59,723 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand 24 states. [2020-10-12 10:01:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:00,220 INFO L93 Difference]: Finished difference Result 365 states and 388 transitions. [2020-10-12 10:01:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:01:00,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 187 [2020-10-12 10:01:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:00,222 INFO L225 Difference]: With dead ends: 365 [2020-10-12 10:01:00,222 INFO L226 Difference]: Without dead ends: 200 [2020-10-12 10:01:00,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-12 10:01:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-12 10:01:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 10:01:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-12 10:01:00,234 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 187 [2020-10-12 10:01:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:00,234 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-12 10:01:00,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:01:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-12 10:01:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-12 10:01:00,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:00,236 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:00,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:01:00,236 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:00,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2054178714, now seen corresponding path program 21 times [2020-10-12 10:01:00,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:00,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103164777] [2020-10-12 10:01:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:05,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-12 10:01:05,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:05,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:01:05,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:05,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:01:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-12 10:01:05,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:01:05,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:05,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:05,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:05,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:05,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:05,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:05,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:05,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-12 10:01:05,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103164777] [2020-10-12 10:01:05,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:05,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:01:05,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56027581] [2020-10-12 10:01:05,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:01:05,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:01:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:05,659 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 25 states. [2020-10-12 10:01:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:06,143 INFO L93 Difference]: Finished difference Result 380 states and 403 transitions. [2020-10-12 10:01:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:01:06,146 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 195 [2020-10-12 10:01:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:06,147 INFO L225 Difference]: With dead ends: 380 [2020-10-12 10:01:06,147 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 10:01:06,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 10:01:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-12 10:01:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 10:01:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 216 transitions. [2020-10-12 10:01:06,157 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 216 transitions. Word has length 195 [2020-10-12 10:01:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:06,157 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 216 transitions. [2020-10-12 10:01:06,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:01:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 216 transitions. [2020-10-12 10:01:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-12 10:01:06,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:06,159 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:06,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:01:06,159 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash 894117278, now seen corresponding path program 22 times [2020-10-12 10:01:06,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:06,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501360585] [2020-10-12 10:01:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:11,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-12 10:01:11,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:11,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:01:11,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:11,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:01:11,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-12 10:01:11,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:01:11,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:11,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:11,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:11,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:11,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2020-10-12 10:01:11,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501360585] [2020-10-12 10:01:11,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:11,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:01:11,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473991526] [2020-10-12 10:01:11,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:01:11,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:01:11,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:11,604 INFO L87 Difference]: Start difference. First operand 208 states and 216 transitions. Second operand 26 states. [2020-10-12 10:01:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:12,104 INFO L93 Difference]: Finished difference Result 395 states and 418 transitions. [2020-10-12 10:01:12,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:01:12,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 203 [2020-10-12 10:01:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:12,106 INFO L225 Difference]: With dead ends: 395 [2020-10-12 10:01:12,107 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 10:01:12,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 10:01:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-12 10:01:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-12 10:01:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-10-12 10:01:12,116 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 203 [2020-10-12 10:01:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:12,116 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-10-12 10:01:12,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:01:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-10-12 10:01:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-12 10:01:12,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:12,118 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:12,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:12,118 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1550650906, now seen corresponding path program 23 times [2020-10-12 10:01:12,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:12,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156389696] [2020-10-12 10:01:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:12,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:01:17,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-12 10:01:17,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:01:17,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:17,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:17,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:17,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:17,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:17,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:17,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:17,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-12 10:01:17,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156389696] [2020-10-12 10:01:17,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:17,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:01:17,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649503593] [2020-10-12 10:01:17,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:01:17,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:01:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:17,667 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 27 states. [2020-10-12 10:01:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:18,244 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2020-10-12 10:01:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:01:18,245 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 211 [2020-10-12 10:01:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:18,247 INFO L225 Difference]: With dead ends: 410 [2020-10-12 10:01:18,247 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 10:01:18,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 10:01:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2020-10-12 10:01:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-12 10:01:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2020-10-12 10:01:18,257 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 211 [2020-10-12 10:01:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:18,257 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2020-10-12 10:01:18,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:01:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2020-10-12 10:01:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-12 10:01:18,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:18,259 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:18,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:18,259 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash 21174302, now seen corresponding path program 24 times [2020-10-12 10:01:18,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:18,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864122471] [2020-10-12 10:01:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:18,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 10:01:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:01:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:23,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:23,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:23,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:23,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:23,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2020-10-12 10:01:23,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864122471] [2020-10-12 10:01:23,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:23,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:01:23,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038926469] [2020-10-12 10:01:23,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:01:23,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:23,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:01:23,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:23,798 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand 28 states. [2020-10-12 10:01:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:24,433 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2020-10-12 10:01:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:01:24,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 219 [2020-10-12 10:01:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:24,435 INFO L225 Difference]: With dead ends: 425 [2020-10-12 10:01:24,435 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 10:01:24,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 10:01:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-12 10:01:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 10:01:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-10-12 10:01:24,446 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 219 [2020-10-12 10:01:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:24,447 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-10-12 10:01:24,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:01:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-10-12 10:01:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-12 10:01:24,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:24,450 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:24,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:24,451 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1576465562, now seen corresponding path program 25 times [2020-10-12 10:01:24,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:24,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165542035] [2020-10-12 10:01:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:24,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:29,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-12 10:01:29,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 10:01:29,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:01:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 10:01:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:01:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:29,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2600 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2020-10-12 10:01:30,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165542035] [2020-10-12 10:01:30,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:30,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:01:30,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648104031] [2020-10-12 10:01:30,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:01:30,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:30,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:01:30,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:30,010 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 29 states. [2020-10-12 10:01:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:30,583 INFO L93 Difference]: Finished difference Result 440 states and 463 transitions. [2020-10-12 10:01:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:01:30,584 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 227 [2020-10-12 10:01:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:30,586 INFO L225 Difference]: With dead ends: 440 [2020-10-12 10:01:30,586 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 10:01:30,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 10:01:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-12 10:01:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-12 10:01:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2020-10-12 10:01:30,596 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 227 [2020-10-12 10:01:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:30,596 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2020-10-12 10:01:30,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:01:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2020-10-12 10:01:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-12 10:01:30,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:30,598 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:30,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:30,598 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash 434203294, now seen corresponding path program 26 times [2020-10-12 10:01:30,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:30,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224150615] [2020-10-12 10:01:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:35,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-12 10:01:35,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 10:01:35,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:01:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 10:01:35,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:01:35,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:36,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:36,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:36,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:36,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:36,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:36,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:36,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:36,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2020-10-12 10:01:36,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224150615] [2020-10-12 10:01:36,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:36,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:01:36,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786400734] [2020-10-12 10:01:36,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:01:36,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:01:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:36,214 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand 30 states. [2020-10-12 10:01:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:36,817 INFO L93 Difference]: Finished difference Result 455 states and 478 transitions. [2020-10-12 10:01:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:01:36,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 235 [2020-10-12 10:01:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:36,820 INFO L225 Difference]: With dead ends: 455 [2020-10-12 10:01:36,821 INFO L226 Difference]: Without dead ends: 248 [2020-10-12 10:01:36,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-12 10:01:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-10-12 10:01:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-12 10:01:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2020-10-12 10:01:36,831 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 235 [2020-10-12 10:01:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:36,831 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2020-10-12 10:01:36,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:01:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2020-10-12 10:01:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-12 10:01:36,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:36,833 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:36,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:36,833 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash 716045082, now seen corresponding path program 27 times [2020-10-12 10:01:36,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:36,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703374834] [2020-10-12 10:01:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:36,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:01:41,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:42,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:42,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:42,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:42,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:42,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:42,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-12 10:01:42,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703374834] [2020-10-12 10:01:42,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:42,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:42,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479849411] [2020-10-12 10:01:42,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:42,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:42,421 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand 31 states. [2020-10-12 10:01:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:43,115 INFO L93 Difference]: Finished difference Result 470 states and 493 transitions. [2020-10-12 10:01:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:01:43,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 243 [2020-10-12 10:01:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:43,117 INFO L225 Difference]: With dead ends: 470 [2020-10-12 10:01:43,117 INFO L226 Difference]: Without dead ends: 256 [2020-10-12 10:01:43,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-12 10:01:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-12 10:01:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-12 10:01:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2020-10-12 10:01:43,127 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 243 [2020-10-12 10:01:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:43,127 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2020-10-12 10:01:43,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2020-10-12 10:01:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 10:01:43,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:43,129 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:43,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:01:43,129 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:43,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1879448862, now seen corresponding path program 28 times [2020-10-12 10:01:43,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:43,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725739909] [2020-10-12 10:01:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:43,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:48,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-12 10:01:48,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:48,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 10:01:48,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:48,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:01:48,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-12 10:01:48,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:01:48,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:48,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:48,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2842 trivial. 0 not checked. [2020-10-12 10:01:48,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725739909] [2020-10-12 10:01:48,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:48,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:01:48,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244703785] [2020-10-12 10:01:48,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:01:48,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:48,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:01:48,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:48,810 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand 32 states. [2020-10-12 10:01:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:49,525 INFO L93 Difference]: Finished difference Result 485 states and 508 transitions. [2020-10-12 10:01:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:01:49,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 251 [2020-10-12 10:01:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:49,527 INFO L225 Difference]: With dead ends: 485 [2020-10-12 10:01:49,528 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 10:01:49,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 10:01:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2020-10-12 10:01:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-12 10:01:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2020-10-12 10:01:49,538 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 251 [2020-10-12 10:01:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:49,538 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2020-10-12 10:01:49,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:01:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2020-10-12 10:01:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-12 10:01:49,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:49,540 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:49,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:01:49,540 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1942871654, now seen corresponding path program 29 times [2020-10-12 10:01:49,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:49,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372697568] [2020-10-12 10:01:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:49,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:54,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:01:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:55,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:55,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:55,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:01:55,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-10-12 10:01:55,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372697568] [2020-10-12 10:01:55,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:55,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:01:55,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427758014] [2020-10-12 10:01:55,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:01:55,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:01:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:55,202 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand 33 states. [2020-10-12 10:01:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:55,946 INFO L93 Difference]: Finished difference Result 500 states and 523 transitions. [2020-10-12 10:01:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:01:55,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 259 [2020-10-12 10:01:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:55,948 INFO L225 Difference]: With dead ends: 500 [2020-10-12 10:01:55,948 INFO L226 Difference]: Without dead ends: 272 [2020-10-12 10:01:55,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-12 10:01:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2020-10-12 10:01:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-12 10:01:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 280 transitions. [2020-10-12 10:01:55,958 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 280 transitions. Word has length 259 [2020-10-12 10:01:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:55,959 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 280 transitions. [2020-10-12 10:01:55,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:01:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 280 transitions. [2020-10-12 10:01:55,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-12 10:01:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:55,961 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:55,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:01:55,961 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash -158257250, now seen corresponding path program 30 times [2020-10-12 10:01:55,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:55,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368527273] [2020-10-12 10:01:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:56,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:02:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 10:02:01,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:02:01,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:01,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:01,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:01,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:01,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:01,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:01,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:01,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:01,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:01,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3720 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2020-10-12 10:02:01,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368527273] [2020-10-12 10:02:01,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:01,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:02:01,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324492649] [2020-10-12 10:02:01,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:02:01,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:02:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:01,678 INFO L87 Difference]: Start difference. First operand 272 states and 280 transitions. Second operand 34 states. [2020-10-12 10:02:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:02,486 INFO L93 Difference]: Finished difference Result 515 states and 538 transitions. [2020-10-12 10:02:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:02:02,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 267 [2020-10-12 10:02:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:02,488 INFO L225 Difference]: With dead ends: 515 [2020-10-12 10:02:02,488 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 10:02:02,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 10:02:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-12 10:02:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 10:02:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 288 transitions. [2020-10-12 10:02:02,497 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 288 transitions. Word has length 267 [2020-10-12 10:02:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:02,497 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 288 transitions. [2020-10-12 10:02:02,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:02:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 288 transitions. [2020-10-12 10:02:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-12 10:02:02,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:02,499 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:02,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:02:02,500 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:02,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1780705306, now seen corresponding path program 31 times [2020-10-12 10:02:02,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:02,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803777557] [2020-10-12 10:02:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:07,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:07,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-12 10:02:07,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:07,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 10:02:07,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:02:07,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-12 10:02:07,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:02:07,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:08,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:08,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:08,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:08,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2020-10-12 10:02:08,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803777557] [2020-10-12 10:02:08,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:08,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:02:08,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079544461] [2020-10-12 10:02:08,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:02:08,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:02:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:08,237 INFO L87 Difference]: Start difference. First operand 280 states and 288 transitions. Second operand 35 states. [2020-10-12 10:02:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:08,949 INFO L93 Difference]: Finished difference Result 530 states and 553 transitions. [2020-10-12 10:02:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:02:08,950 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 275 [2020-10-12 10:02:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:08,952 INFO L225 Difference]: With dead ends: 530 [2020-10-12 10:02:08,953 INFO L226 Difference]: Without dead ends: 288 [2020-10-12 10:02:08,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-12 10:02:08,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-10-12 10:02:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-12 10:02:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 296 transitions. [2020-10-12 10:02:08,962 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 296 transitions. Word has length 275 [2020-10-12 10:02:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:08,962 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 296 transitions. [2020-10-12 10:02:08,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:02:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 296 transitions. [2020-10-12 10:02:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-12 10:02:08,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:08,964 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:08,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:02:08,965 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1570594274, now seen corresponding path program 32 times [2020-10-12 10:02:08,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:08,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297796061] [2020-10-12 10:02:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:09,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-12 10:02:14,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:02:14,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:14,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:14,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:14,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:14,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:14,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:14,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:14,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:14,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2020-10-12 10:02:14,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297796061] [2020-10-12 10:02:14,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:14,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:02:14,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461382664] [2020-10-12 10:02:14,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:02:14,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:02:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:14,726 INFO L87 Difference]: Start difference. First operand 288 states and 296 transitions. Second operand 36 states. [2020-10-12 10:02:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:15,563 INFO L93 Difference]: Finished difference Result 545 states and 568 transitions. [2020-10-12 10:02:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:02:15,564 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 283 [2020-10-12 10:02:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:15,566 INFO L225 Difference]: With dead ends: 545 [2020-10-12 10:02:15,566 INFO L226 Difference]: Without dead ends: 296 [2020-10-12 10:02:15,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-12 10:02:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2020-10-12 10:02:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-12 10:02:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 304 transitions. [2020-10-12 10:02:15,576 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 304 transitions. Word has length 283 [2020-10-12 10:02:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:15,576 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 304 transitions. [2020-10-12 10:02:15,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:02:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 304 transitions. [2020-10-12 10:02:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-12 10:02:15,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:15,578 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:15,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:15,579 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash -903754086, now seen corresponding path program 33 times [2020-10-12 10:02:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:15,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799678758] [2020-10-12 10:02:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:20,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:02:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:21,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:21,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:21,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:21,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:21,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4488 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2020-10-12 10:02:21,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799678758] [2020-10-12 10:02:21,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:21,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:02:21,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181605038] [2020-10-12 10:02:21,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:02:21,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:02:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:21,420 INFO L87 Difference]: Start difference. First operand 296 states and 304 transitions. Second operand 37 states. [2020-10-12 10:02:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:22,284 INFO L93 Difference]: Finished difference Result 560 states and 583 transitions. [2020-10-12 10:02:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:02:22,285 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 291 [2020-10-12 10:02:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:22,286 INFO L225 Difference]: With dead ends: 560 [2020-10-12 10:02:22,287 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 10:02:22,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 10:02:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-12 10:02:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-12 10:02:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 312 transitions. [2020-10-12 10:02:22,297 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 312 transitions. Word has length 291 [2020-10-12 10:02:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:22,297 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 312 transitions. [2020-10-12 10:02:22,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:02:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 312 transitions. [2020-10-12 10:02:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-12 10:02:22,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:22,299 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:22,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:02:22,300 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1784312990, now seen corresponding path program 34 times [2020-10-12 10:02:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:22,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201950065] [2020-10-12 10:02:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:23,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:27,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-12 10:02:27,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:27,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:02:27,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:27,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:02:27,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-12 10:02:27,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:02:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:28,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:28,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:28,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:28,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:28,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:28,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:28,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4165 trivial. 0 not checked. [2020-10-12 10:02:28,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201950065] [2020-10-12 10:02:28,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:28,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:02:28,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743572733] [2020-10-12 10:02:28,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:02:28,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:02:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:28,146 INFO L87 Difference]: Start difference. First operand 304 states and 312 transitions. Second operand 38 states. [2020-10-12 10:02:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:29,033 INFO L93 Difference]: Finished difference Result 575 states and 598 transitions. [2020-10-12 10:02:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:02:29,033 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 299 [2020-10-12 10:02:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:29,035 INFO L225 Difference]: With dead ends: 575 [2020-10-12 10:02:29,035 INFO L226 Difference]: Without dead ends: 312 [2020-10-12 10:02:29,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-12 10:02:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-12 10:02:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-12 10:02:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 320 transitions. [2020-10-12 10:02:29,044 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 320 transitions. Word has length 299 [2020-10-12 10:02:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:29,045 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 320 transitions. [2020-10-12 10:02:29,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:02:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 320 transitions. [2020-10-12 10:02:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-12 10:02:29,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:29,047 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:29,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:02:29,047 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash -808626918, now seen corresponding path program 35 times [2020-10-12 10:02:29,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:29,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255327041] [2020-10-12 10:02:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:34,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-12 10:02:34,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:34,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-12 10:02:34,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:02:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:34,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:02:34,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:34,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:34,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:34,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:34,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:34,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2020-10-12 10:02:34,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255327041] [2020-10-12 10:02:34,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:34,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:02:34,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548709783] [2020-10-12 10:02:34,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:02:34,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:02:34,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:34,975 INFO L87 Difference]: Start difference. First operand 312 states and 320 transitions. Second operand 39 states. [2020-10-12 10:02:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:35,793 INFO L93 Difference]: Finished difference Result 590 states and 613 transitions. [2020-10-12 10:02:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:02:35,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 307 [2020-10-12 10:02:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:35,795 INFO L225 Difference]: With dead ends: 590 [2020-10-12 10:02:35,795 INFO L226 Difference]: Without dead ends: 320 [2020-10-12 10:02:35,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-12 10:02:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-10-12 10:02:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-12 10:02:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 328 transitions. [2020-10-12 10:02:35,805 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 328 transitions. Word has length 307 [2020-10-12 10:02:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:35,805 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 328 transitions. [2020-10-12 10:02:35,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:02:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 328 transitions. [2020-10-12 10:02:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-12 10:02:35,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:35,807 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:35,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:02:35,808 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1196992286, now seen corresponding path program 36 times [2020-10-12 10:02:35,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:35,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927710496] [2020-10-12 10:02:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:35,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:40,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:40,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-12 10:02:40,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-12 10:02:40,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:02:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 10:02:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:02:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:41,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:41,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:41,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:41,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:41,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 4662 trivial. 0 not checked. [2020-10-12 10:02:41,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927710496] [2020-10-12 10:02:41,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:41,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:02:41,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832715743] [2020-10-12 10:02:41,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:02:41,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:41,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:02:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:41,844 INFO L87 Difference]: Start difference. First operand 320 states and 328 transitions. Second operand 40 states. [2020-10-12 10:02:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:42,763 INFO L93 Difference]: Finished difference Result 605 states and 628 transitions. [2020-10-12 10:02:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:02:42,764 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 315 [2020-10-12 10:02:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:42,766 INFO L225 Difference]: With dead ends: 605 [2020-10-12 10:02:42,766 INFO L226 Difference]: Without dead ends: 328 [2020-10-12 10:02:42,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-12 10:02:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2020-10-12 10:02:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-12 10:02:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 336 transitions. [2020-10-12 10:02:42,776 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 336 transitions. Word has length 315 [2020-10-12 10:02:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:42,776 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 336 transitions. [2020-10-12 10:02:42,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:02:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 336 transitions. [2020-10-12 10:02:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-12 10:02:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:42,779 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:42,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:02:42,779 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1127875686, now seen corresponding path program 37 times [2020-10-12 10:02:42,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:42,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505816594] [2020-10-12 10:02:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:43,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:43,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:43,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:47,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:47,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-12 10:02:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:02:47,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:02:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-12 10:02:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:02:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:48,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:48,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:48,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 4921 trivial. 0 not checked. [2020-10-12 10:02:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505816594] [2020-10-12 10:02:48,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:48,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:02:48,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672737668] [2020-10-12 10:02:48,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:02:48,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:48,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:02:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:48,772 INFO L87 Difference]: Start difference. First operand 328 states and 336 transitions. Second operand 41 states. [2020-10-12 10:02:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:49,724 INFO L93 Difference]: Finished difference Result 620 states and 643 transitions. [2020-10-12 10:02:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:02:49,724 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 323 [2020-10-12 10:02:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:49,727 INFO L225 Difference]: With dead ends: 620 [2020-10-12 10:02:49,727 INFO L226 Difference]: Without dead ends: 336 [2020-10-12 10:02:49,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-12 10:02:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2020-10-12 10:02:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-12 10:02:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 344 transitions. [2020-10-12 10:02:49,737 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 344 transitions. Word has length 323 [2020-10-12 10:02:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:49,738 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 344 transitions. [2020-10-12 10:02:49,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:02:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 344 transitions. [2020-10-12 10:02:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-12 10:02:49,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:49,740 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:49,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:02:49,740 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 876427678, now seen corresponding path program 38 times [2020-10-12 10:02:49,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:49,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51025177] [2020-10-12 10:02:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:49,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:50,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:50,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:02:54,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-12 10:02:54,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:02:54,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:55,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:55,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:55,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:55,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:55,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:55,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:55,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:55,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:55,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5928 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5187 trivial. 0 not checked. [2020-10-12 10:02:55,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51025177] [2020-10-12 10:02:55,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:55,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:02:55,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411191944] [2020-10-12 10:02:55,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:02:55,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:02:55,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:02:55,797 INFO L87 Difference]: Start difference. First operand 336 states and 344 transitions. Second operand 42 states. [2020-10-12 10:02:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:56,757 INFO L93 Difference]: Finished difference Result 635 states and 658 transitions. [2020-10-12 10:02:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:02:56,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 331 [2020-10-12 10:02:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:56,761 INFO L225 Difference]: With dead ends: 635 [2020-10-12 10:02:56,761 INFO L226 Difference]: Without dead ends: 344 [2020-10-12 10:02:56,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:02:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-12 10:02:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2020-10-12 10:02:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-12 10:02:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 352 transitions. [2020-10-12 10:02:56,771 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 352 transitions. Word has length 331 [2020-10-12 10:02:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:56,771 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 352 transitions. [2020-10-12 10:02:56,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:02:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 352 transitions. [2020-10-12 10:02:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-12 10:02:56,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:56,773 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:56,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:02:56,774 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash -257179110, now seen corresponding path program 39 times [2020-10-12 10:02:56,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:56,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529173469] [2020-10-12 10:02:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:57,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:57,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:01,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 134 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:03:01,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:02,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:02,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:02,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:02,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:03:02,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-10-12 10:03:02,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529173469] [2020-10-12 10:03:02,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:02,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:03:02,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558051697] [2020-10-12 10:03:02,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:03:02,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:03:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:02,873 INFO L87 Difference]: Start difference. First operand 344 states and 352 transitions. Second operand 43 states. [2020-10-12 10:03:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:03,734 INFO L93 Difference]: Finished difference Result 650 states and 673 transitions. [2020-10-12 10:03:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:03:03,735 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 339 [2020-10-12 10:03:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:03,737 INFO L225 Difference]: With dead ends: 650 [2020-10-12 10:03:03,737 INFO L226 Difference]: Without dead ends: 352 [2020-10-12 10:03:03,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-12 10:03:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-10-12 10:03:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-12 10:03:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2020-10-12 10:03:03,747 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 339 [2020-10-12 10:03:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:03,747 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2020-10-12 10:03:03,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:03:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2020-10-12 10:03:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-12 10:03:03,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:03,750 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:03,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:03:03,750 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:03,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:03,750 INFO L82 PathProgramCache]: Analyzing trace with hash 770190366, now seen corresponding path program 40 times [2020-10-12 10:03:03,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:03,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246283915] [2020-10-12 10:03:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:03,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:04,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:04,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:04,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking...