/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-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:16:54,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:16:54,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:16:54,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:16:54,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:16:54,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:16:54,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:16:54,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:16:54,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:16:54,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:16:54,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:16:54,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:16:54,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:16:54,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:16:54,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:16:54,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:16:54,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:16:54,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:16:54,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:16:54,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:16:54,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:16:54,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:16:54,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:16:54,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:16:54,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:16:54,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:16:54,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:16:54,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:16:54,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:16:54,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:16:54,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:16:54,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:16:54,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:16:54,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:16:54,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:16:54,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:16:54,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:16:54,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:16:54,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:16:54,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:16:54,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:16:54,200 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 10:16:54,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:16:54,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:16:54,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:16:54,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:16:54,226 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:16:54,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:16:54,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:16:54,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:16:54,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:16:54,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:16:54,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:16:54,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:16:54,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:16:54,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:16:54,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:16:54,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:16:54,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:16:54,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:16:54,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:16:54,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:16:54,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:16:54,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:16:54,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:16:54,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:16:54,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:16:54,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:16:54,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:16:54,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:16:54,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:16:54,231 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 10:16:54,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:16:54,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:16:54,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:16:54,573 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:16:54,574 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:16:54,575 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-10-12 10:16:54,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30b73f1c7/c8da9cdddeb44d5d86376e683ee22f82/FLAG27cb219ca [2020-10-12 10:16:55,096 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:16:55,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-10-12 10:16:55,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30b73f1c7/c8da9cdddeb44d5d86376e683ee22f82/FLAG27cb219ca [2020-10-12 10:16:55,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30b73f1c7/c8da9cdddeb44d5d86376e683ee22f82 [2020-10-12 10:16:55,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:16:55,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:16:55,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:55,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:16:55,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:16:55,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f14d527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55, skipping insertion in model container [2020-10-12 10:16:55,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:16:55,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:16:55,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:55,668 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:16:55,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:55,707 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:16:55,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55 WrapperNode [2020-10-12 10:16:55,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:55,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:16:55,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:16:55,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:16:55,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (1/1) ... [2020-10-12 10:16:55,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:16:55,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:16:55,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:16:55,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:16:55,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (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 10:16:55,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:16:55,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:16:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:16:55,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:16:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:16:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:16:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:16:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:16:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:16:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:16:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:16:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:16:56,326 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:16:56,327 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:16:56,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:56 BoogieIcfgContainer [2020-10-12 10:16:56,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:16:56,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:16:56,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:16:56,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:16:56,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:16:55" (1/3) ... [2020-10-12 10:16:56,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef4bb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:56, skipping insertion in model container [2020-10-12 10:16:56,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:55" (2/3) ... [2020-10-12 10:16:56,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef4bb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:56, skipping insertion in model container [2020-10-12 10:16:56,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:56" (3/3) ... [2020-10-12 10:16:56,340 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2020-10-12 10:16:56,349 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:16:56,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:16:56,368 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:16:56,389 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:16:56,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:16:56,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:16:56,390 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:16:56,390 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:16:56,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:16:56,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:16:56,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:16:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-12 10:16:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:16:56,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:56,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:56,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:56,422 INFO L82 PathProgramCache]: Analyzing trace with hash -72789506, now seen corresponding path program 1 times [2020-10-12 10:16:56,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:56,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111481149] [2020-10-12 10:16:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:56,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:56,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:16:56,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:56,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-12 10:16:56,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:56,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:16:56,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:56,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:16:56,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:56,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:56,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:56,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 10:16:56,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:56,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:56,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:56,798 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 10:16:56,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111481149] [2020-10-12 10:16:56,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:56,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:16:56,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629486407] [2020-10-12 10:16:56,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:16:56,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:56,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:16:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:56,826 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-12 10:16:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:56,948 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2020-10-12 10:16:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:16:56,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-12 10:16:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:56,960 INFO L225 Difference]: With dead ends: 51 [2020-10-12 10:16:56,961 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 10:16:56,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 10:16:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-12 10:16:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 10:16:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-12 10:16:57,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-12 10:16:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:57,016 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-12 10:16:57,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:16:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-12 10:16:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:16:57,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:57,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:57,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:16:57,020 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1254487381, now seen corresponding path program 1 times [2020-10-12 10:16:57,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:57,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218346129] [2020-10-12 10:16:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:57,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:57,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:16:57,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-12 10:16:57,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:57,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:57,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:57,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:57,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:57,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:16:57,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:57,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:57,237 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 10:16:57,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218346129] [2020-10-12 10:16:57,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:57,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:16:57,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141097001] [2020-10-12 10:16:57,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:16:57,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:16:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:16:57,242 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-12 10:16:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:57,354 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-12 10:16:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:16:57,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 10:16:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:57,356 INFO L225 Difference]: With dead ends: 43 [2020-10-12 10:16:57,356 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 10:16:57,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:16:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 10:16:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-12 10:16:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 10:16:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-12 10:16:57,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-10-12 10:16:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:57,367 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-12 10:16:57,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:16:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-12 10:16:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 10:16:57,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:57,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:57,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:16:57,369 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash 343855824, now seen corresponding path program 1 times [2020-10-12 10:16:57,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:57,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907747911] [2020-10-12 10:16:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:57,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:58,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:58,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 10:16:58,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:16:58,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-12 10:16:58,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:16:58,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:58,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:16:58,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:58,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:58,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:58,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:58,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:58,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:58,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:16:58,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:58,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907747911] [2020-10-12 10:16:58,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:58,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:16:58,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526256172] [2020-10-12 10:16:58,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:16:58,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:58,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:16:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:16:58,932 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 12 states. [2020-10-12 10:16:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:59,901 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-12 10:16:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:16:59,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-12 10:16:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:59,904 INFO L225 Difference]: With dead ends: 58 [2020-10-12 10:16:59,905 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:16:59,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:16:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:16:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-10-12 10:16:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:16:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-12 10:16:59,929 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2020-10-12 10:16:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:59,929 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-12 10:16:59,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:16:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-12 10:16:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 10:16:59,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:59,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:59,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:16:59,932 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1044920402, now seen corresponding path program 1 times [2020-10-12 10:16:59,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:59,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357367911] [2020-10-12 10:16:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:00,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:00,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 10:17:00,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:17:00,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-12 10:17:00,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:00,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:17:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:00,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:17:00,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:00,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:00,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:00,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:00,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:17:00,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:00,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:00,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357367911] [2020-10-12 10:17:00,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:00,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:17:00,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253730266] [2020-10-12 10:17:00,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:17:00,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:00,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:17:00,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:17:00,516 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 10 states. [2020-10-12 10:17:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:01,107 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-12 10:17:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:17:01,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 10:17:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:01,111 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:17:01,111 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 10:17:01,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:17:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 10:17:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-12 10:17:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:17:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-12 10:17:01,121 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2020-10-12 10:17:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:01,121 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-12 10:17:01,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:17:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-12 10:17:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 10:17:01,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:01,123 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:01,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:17:01,123 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 969143491, now seen corresponding path program 1 times [2020-10-12 10:17:01,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:01,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768135573] [2020-10-12 10:17:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:01,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:01,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:02,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:02,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 10:17:02,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:17:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-12 10:17:02,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:17:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:17:02,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:02,879 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-12 10:17:03,125 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-12 10:17:03,343 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-12 10:17:03,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:03,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:03,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:03,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:17:03,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:03,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:03,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:03,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:03,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768135573] [2020-10-12 10:17:03,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:03,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:17:03,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226947340] [2020-10-12 10:17:03,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:17:03,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:03,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:17:03,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:17:03,472 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 13 states. [2020-10-12 10:17:03,825 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 10:17:04,017 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-12 10:17:04,281 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 10:17:04,539 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-12 10:17:04,844 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 10:17:05,102 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 10:17:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:05,389 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-12 10:17:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:17:05,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-12 10:17:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:05,391 INFO L225 Difference]: With dead ends: 70 [2020-10-12 10:17:05,392 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:17:05,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:17:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:17:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-10-12 10:17:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 10:17:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-12 10:17:05,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 21 [2020-10-12 10:17:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:05,406 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-12 10:17:05,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:17:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-12 10:17:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:17:05,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:05,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:05,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:17:05,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash 908656757, now seen corresponding path program 2 times [2020-10-12 10:17:05,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:05,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860698317] [2020-10-12 10:17:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:06,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:06,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 10:17:06,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:17:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-12 10:17:06,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:17:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:06,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:17:06,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:06,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:06,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:06,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:06,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:06,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:17:06,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:06,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:06,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860698317] [2020-10-12 10:17:06,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:06,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:17:06,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686422089] [2020-10-12 10:17:06,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:17:06,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:17:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:17:06,877 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 16 states. [2020-10-12 10:17:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:08,019 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-10-12 10:17:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:17:08,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-10-12 10:17:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:08,021 INFO L225 Difference]: With dead ends: 94 [2020-10-12 10:17:08,022 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 10:17:08,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:17:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 10:17:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2020-10-12 10:17:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:17:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-12 10:17:08,038 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 22 [2020-10-12 10:17:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:08,038 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-12 10:17:08,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:17:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-12 10:17:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:17:08,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:08,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:08,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:17:08,041 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1609721335, now seen corresponding path program 1 times [2020-10-12 10:17:08,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:08,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171015557] [2020-10-12 10:17:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:08,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:08,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:09,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 10:17:09,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:17:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-12 10:17:09,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:09,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:17:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:17:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:10,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:10,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:10,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:10,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:10,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:17:10,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:10,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:10,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:10,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171015557] [2020-10-12 10:17:10,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:10,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:17:10,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289246965] [2020-10-12 10:17:10,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:17:10,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:17:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:17:10,311 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 17 states. [2020-10-12 10:17:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:12,102 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2020-10-12 10:17:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:17:12,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-10-12 10:17:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:12,105 INFO L225 Difference]: With dead ends: 126 [2020-10-12 10:17:12,105 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 10:17:12,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=375, Invalid=1265, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:17:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 10:17:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 55. [2020-10-12 10:17:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 10:17:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-10-12 10:17:12,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 22 [2020-10-12 10:17:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:12,133 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-10-12 10:17:12,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:17:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-10-12 10:17:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:17:12,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:12,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:12,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:17:12,135 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash -371206921, now seen corresponding path program 2 times [2020-10-12 10:17:12,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:12,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719584113] [2020-10-12 10:17:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:12,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:12,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:12,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:13,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 10:17:13,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:17:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-12 10:17:13,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:17:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:17:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:13,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:13,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:13,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:13,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:13,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:17:13,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:13,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:13,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:13,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:13,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719584113] [2020-10-12 10:17:13,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:13,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:17:13,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853462883] [2020-10-12 10:17:13,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:17:13,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:17:13,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:17:13,578 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 16 states. [2020-10-12 10:17:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:15,184 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2020-10-12 10:17:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:17:15,186 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-10-12 10:17:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:15,188 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:17:15,188 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 10:17:15,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:17:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 10:17:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 56. [2020-10-12 10:17:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 10:17:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-12 10:17:15,203 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 22 [2020-10-12 10:17:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:15,203 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-12 10:17:15,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:17:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-12 10:17:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:17:15,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:15,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:15,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:17:15,205 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:15,205 INFO L82 PathProgramCache]: Analyzing trace with hash 329857657, now seen corresponding path program 2 times [2020-10-12 10:17:15,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:15,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459670189] [2020-10-12 10:17:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:15,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:15,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:15,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:16,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:16,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 10:17:16,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:17:16,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-12 10:17:16,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:16,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:17:16,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:16,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:17:16,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:16,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:16,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:16,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:16,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 10:17:16,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:16,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:16,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:16,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459670189] [2020-10-12 10:17:16,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:16,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:17:16,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163082713] [2020-10-12 10:17:16,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:17:16,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:16,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:17:16,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:17:16,894 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 14 states. [2020-10-12 10:17:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:18,098 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-12 10:17:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:17:18,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-12 10:17:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:18,101 INFO L225 Difference]: With dead ends: 114 [2020-10-12 10:17:18,102 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 10:17:18,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:17:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 10:17:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-12 10:17:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:17:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-10-12 10:17:18,115 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 22 [2020-10-12 10:17:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:18,115 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-10-12 10:17:18,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:17:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-10-12 10:17:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 10:17:18,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:18,117 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:18,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:17:18,117 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1640868336, now seen corresponding path program 2 times [2020-10-12 10:17:18,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:18,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888247930] [2020-10-12 10:17:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:22,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:22,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:17:22,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:17:22,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3930 [2020-10-12 10:17:22,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:22,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:17:22,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:22,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:17:22,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:22,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:22,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888247930] [2020-10-12 10:17:22,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:22,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:17:22,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947694914] [2020-10-12 10:17:22,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:17:22,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:17:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:17:22,770 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 14 states. [2020-10-12 10:17:23,104 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 10:17:23,285 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-12 10:17:23,508 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-12 10:17:23,722 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:17:23,916 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 10:17:24,093 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-12 10:17:24,336 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 10:17:24,573 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 10:17:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:24,856 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-12 10:17:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:17:24,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-12 10:17:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:24,858 INFO L225 Difference]: With dead ends: 85 [2020-10-12 10:17:24,858 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 10:17:24,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:17:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 10:17:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-10-12 10:17:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:17:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-10-12 10:17:24,886 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 24 [2020-10-12 10:17:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:24,888 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-10-12 10:17:24,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:17:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-10-12 10:17:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:17:24,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:24,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:24,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:17:24,893 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -728127234, now seen corresponding path program 3 times [2020-10-12 10:17:24,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:24,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228747094] [2020-10-12 10:17:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:24,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:28,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:28,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 10:17:28,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:17:28,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3985 [2020-10-12 10:17:28,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:28,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:17:28,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:17:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:29,648 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-12 10:17:29,958 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 10:17:30,401 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-12 10:17:30,959 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-12 10:17:31,600 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-12 10:17:31,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:31,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:31,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:31,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:17:31,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:31,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:31,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228747094] [2020-10-12 10:17:31,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:31,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:17:31,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006064898] [2020-10-12 10:17:31,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:17:31,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:17:31,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:17:31,774 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 16 states. [2020-10-12 10:17:32,368 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-12 10:17:32,666 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2020-10-12 10:17:33,014 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-12 10:17:33,386 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2020-10-12 10:17:33,714 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-12 10:17:34,258 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-12 10:17:34,745 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-12 10:17:35,304 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 10:17:35,961 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-12 10:17:36,748 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-12 10:17:37,008 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:17:37,655 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-12 10:17:38,383 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-10-12 10:17:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:39,120 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2020-10-12 10:17:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:17:39,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-12 10:17:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:39,123 INFO L225 Difference]: With dead ends: 102 [2020-10-12 10:17:39,123 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 10:17:39,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:17:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 10:17:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-12 10:17:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:17:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-10-12 10:17:39,139 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 25 [2020-10-12 10:17:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:39,140 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-10-12 10:17:39,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:17:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-10-12 10:17:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:17:39,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:39,141 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:39,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:17:39,142 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash 533936412, now seen corresponding path program 3 times [2020-10-12 10:17:39,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:39,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713723913] [2020-10-12 10:17:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:39,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:39,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:41,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:41,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:41,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:17:41,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:17:41,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2784 [2020-10-12 10:17:41,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:41,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:17:41,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:17:41,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:42,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:42,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:42,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:17:42,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:42,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:42,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:42,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713723913] [2020-10-12 10:17:42,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:42,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:17:42,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017951692] [2020-10-12 10:17:42,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:17:42,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:42,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:17:42,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:17:42,625 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 20 states. [2020-10-12 10:17:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:44,006 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-10-12 10:17:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:17:44,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-10-12 10:17:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:44,010 INFO L225 Difference]: With dead ends: 124 [2020-10-12 10:17:44,010 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 10:17:44,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:17:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 10:17:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 66. [2020-10-12 10:17:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:17:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-10-12 10:17:44,030 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 26 [2020-10-12 10:17:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:44,030 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-10-12 10:17:44,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:17:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-10-12 10:17:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:17:44,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:44,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:44,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:17:44,032 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1856071908, now seen corresponding path program 4 times [2020-10-12 10:17:44,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:44,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690112747] [2020-10-12 10:17:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:44,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:44,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:46,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:46,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 10:17:46,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:17:46,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2556 [2020-10-12 10:17:46,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:17:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:17:46,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:47,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:47,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:47,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:47,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:47,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:17:47,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:47,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:47,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:47,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690112747] [2020-10-12 10:17:47,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:47,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:17:47,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086872259] [2020-10-12 10:17:47,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:17:47,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:47,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:17:47,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:17:47,525 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 19 states. [2020-10-12 10:17:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:49,768 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2020-10-12 10:17:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:17:49,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-12 10:17:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:49,770 INFO L225 Difference]: With dead ends: 149 [2020-10-12 10:17:49,771 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 10:17:49,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=434, Invalid=1048, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:17:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 10:17:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 65. [2020-10-12 10:17:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:17:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-12 10:17:49,800 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 26 [2020-10-12 10:17:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:49,800 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-12 10:17:49,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:17:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-12 10:17:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:17:49,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:49,804 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:49,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:17:49,804 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1551873629, now seen corresponding path program 4 times [2020-10-12 10:17:49,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:49,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956958628] [2020-10-12 10:17:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:50,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:52,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:17:54,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:55,391 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-12 10:17:55,576 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 10:17:55,798 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 10:17:55,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:55,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:55,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:55,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:55,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:55,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:17:55,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:55,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:55,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:55,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:17:55,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:17:55,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956958628] [2020-10-12 10:17:55,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:55,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:17:55,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606161872] [2020-10-12 10:17:55,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:17:55,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:17:55,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:17:55,998 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 16 states. [2020-10-12 10:17:56,392 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-12 10:17:56,619 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 10:17:56,861 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-12 10:17:57,091 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-12 10:17:57,290 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-12 10:17:57,491 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-12 10:17:57,722 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-12 10:17:57,943 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-12 10:17:58,233 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 10:17:58,510 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 10:17:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:58,870 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-12 10:17:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:17:58,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-12 10:17:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:58,873 INFO L225 Difference]: With dead ends: 96 [2020-10-12 10:17:58,873 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 10:17:58,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:17:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 10:17:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-10-12 10:17:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:17:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2020-10-12 10:17:58,890 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 27 [2020-10-12 10:17:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:58,891 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2020-10-12 10:17:58,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:17:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2020-10-12 10:17:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:17:58,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:58,892 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:17:58,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:17:58,892 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1396291627, now seen corresponding path program 5 times [2020-10-12 10:17:58,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:58,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736124811] [2020-10-12 10:17:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:59,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:59,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:00,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:00,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:01,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:03,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:03,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:18:03,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 10:18:03,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:18:03,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:03,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:18:03,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:03,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:18:03,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:04,586 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-12 10:18:04,916 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 10:18:05,292 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 10:18:05,753 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-12 10:18:06,223 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-12 10:18:06,602 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-12 10:18:06,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:06,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:06,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:06,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:18:06,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:06,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:06,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736124811] [2020-10-12 10:18:06,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:06,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:18:06,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714971261] [2020-10-12 10:18:06,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:18:06,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:18:06,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:18:06,789 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 17 states. [2020-10-12 10:18:07,484 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-12 10:18:07,815 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2020-10-12 10:18:08,137 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-10-12 10:18:08,477 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2020-10-12 10:18:08,799 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-12 10:18:09,330 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-12 10:18:09,723 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2020-10-12 10:18:10,301 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-12 10:18:10,930 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 10:18:11,205 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-12 10:18:11,694 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-12 10:18:11,978 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2020-10-12 10:18:12,491 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-12 10:18:13,022 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-12 10:18:13,787 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-10-12 10:18:14,503 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-12 10:18:14,919 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-12 10:18:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:15,314 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2020-10-12 10:18:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:18:15,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-12 10:18:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:15,316 INFO L225 Difference]: With dead ends: 101 [2020-10-12 10:18:15,316 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:18:15,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:18:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:18:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2020-10-12 10:18:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 10:18:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2020-10-12 10:18:15,333 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 28 [2020-10-12 10:18:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:15,333 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2020-10-12 10:18:15,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:18:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2020-10-12 10:18:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:18:15,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:15,334 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:15,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:18:15,335 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -390805575, now seen corresponding path program 6 times [2020-10-12 10:18:15,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:15,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602809101] [2020-10-12 10:18:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:15,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:16,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:20,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:20,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:20,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:18:20,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:18:20,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:18:20,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:20,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:18:20,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:18:20,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:18:20,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:21,980 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-12 10:18:22,418 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-12 10:18:23,412 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-12 10:18:25,233 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 125 DAG size of output: 100 [2020-10-12 10:18:26,512 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 99 [2020-10-12 10:18:28,840 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 150 DAG size of output: 101 [2020-10-12 10:18:31,407 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 155 DAG size of output: 106 [2020-10-12 10:18:33,970 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 156 DAG size of output: 107 [2020-10-12 10:18:34,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:34,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:34,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:34,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:34,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:34,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:18:34,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:34,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:18:34,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:18:34,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602809101] [2020-10-12 10:18:34,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:34,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:18:34,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261812165] [2020-10-12 10:18:34,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:18:34,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:18:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:18:34,342 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 20 states. [2020-10-12 10:18:35,190 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 58 [2020-10-12 10:18:35,778 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 57 [2020-10-12 10:18:36,379 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 62 [2020-10-12 10:18:38,348 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-10-12 10:18:38,926 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 63 [2020-10-12 10:18:39,508 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-12 10:18:40,150 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 70 [2020-10-12 10:18:41,195 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-10-12 10:18:41,946 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 76 [2020-10-12 10:18:43,234 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 147 DAG size of output: 91 [2020-10-12 10:18:44,396 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 96 [2020-10-12 10:18:46,345 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 97 [2020-10-12 10:18:48,074 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 135 DAG size of output: 103 [2020-10-12 10:18:50,529 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2020-10-12 10:18:53,156 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 141 DAG size of output: 109 [2020-10-12 10:18:55,671 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 124 DAG size of output: 118 [2020-10-12 10:18:58,545 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 129 DAG size of output: 123 [2020-10-12 10:19:02,103 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 130 DAG size of output: 124 [2020-10-12 10:19:03,657 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 10:19:07,223 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 137 DAG size of output: 131 [2020-10-12 10:19:11,607 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 143 DAG size of output: 137 [2020-10-12 10:19:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:15,043 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-10-12 10:19:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:19:15,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-12 10:19:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:15,049 INFO L225 Difference]: With dead ends: 117 [2020-10-12 10:19:15,049 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 10:19:15,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:19:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 10:19:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2020-10-12 10:19:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 10:19:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2020-10-12 10:19:15,072 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 29 [2020-10-12 10:19:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:15,072 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2020-10-12 10:19:15,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:19:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2020-10-12 10:19:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:19:15,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:15,073 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:15,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:19:15,074 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash -182015728, now seen corresponding path program 7 times [2020-10-12 10:19:15,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:15,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641283520] [2020-10-12 10:19:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:15,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:15,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:20,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:19:20,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:19:20,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:19:20,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:19:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:19:20,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:19:20,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:20,373 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-12 10:19:20,512 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-10-12 10:19:20,695 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-12 10:19:20,982 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-12 10:19:21,246 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-12 10:19:21,426 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-12 10:19:21,603 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-12 10:19:21,801 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-12 10:19:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:22,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:22,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:22,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641283520] [2020-10-12 10:19:22,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:22,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:19:22,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164195602] [2020-10-12 10:19:22,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:19:22,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:22,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:19:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:19:22,053 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 16 states. [2020-10-12 10:19:22,399 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-12 10:19:22,951 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-12 10:19:23,337 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 10:19:23,568 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-12 10:19:23,842 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 10:19:24,090 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-12 10:19:24,348 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 10:19:24,581 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-12 10:19:24,970 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-12 10:19:25,310 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 10:19:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:25,877 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-10-12 10:19:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:19:25,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-12 10:19:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:25,881 INFO L225 Difference]: With dead ends: 109 [2020-10-12 10:19:25,882 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 10:19:25,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:19:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 10:19:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-12 10:19:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:19:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-12 10:19:25,905 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 30 [2020-10-12 10:19:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:25,906 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-12 10:19:25,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:19:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-10-12 10:19:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:19:25,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:25,907 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:25,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:19:25,907 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash -105529663, now seen corresponding path program 5 times [2020-10-12 10:19:25,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:25,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851213560] [2020-10-12 10:19:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:25,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:26,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:27,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:28,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4218 [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:19:30,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:19:30,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:19:30,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:30,466 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-12 10:19:30,693 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-12 10:19:30,822 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-12 10:19:31,335 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-12 10:19:32,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:32,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:32,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:32,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:32,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:32,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:19:32,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:32,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851213560] [2020-10-12 10:19:32,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:32,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:19:32,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781004194] [2020-10-12 10:19:32,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:19:32,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:19:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:19:32,332 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 23 states. [2020-10-12 10:19:32,982 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-12 10:19:33,203 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-12 10:19:33,506 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-12 10:19:33,749 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-12 10:19:34,040 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-12 10:19:34,324 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-12 10:19:34,558 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-12 10:19:34,817 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2020-10-12 10:19:35,033 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-12 10:19:35,242 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-10-12 10:19:35,967 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-12 10:19:36,381 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2020-10-12 10:19:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:37,972 INFO L93 Difference]: Finished difference Result 171 states and 207 transitions. [2020-10-12 10:19:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:19:37,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-12 10:19:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:37,977 INFO L225 Difference]: With dead ends: 171 [2020-10-12 10:19:37,978 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 10:19:37,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:19:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 10:19:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 80. [2020-10-12 10:19:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:19:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-10-12 10:19:38,006 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 30 [2020-10-12 10:19:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:38,007 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-10-12 10:19:38,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:19:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-10-12 10:19:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:19:38,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:38,008 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:38,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:19:38,008 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash 491693470, now seen corresponding path program 8 times [2020-10-12 10:19:38,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:38,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729416684] [2020-10-12 10:19:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:38,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:38,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:38,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:39,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:40,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:42,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:42,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:43,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:43,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:19:43,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:19:43,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:19:43,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:19:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:19:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:19:43,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:43,938 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-12 10:19:44,282 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-12 10:19:44,657 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-12 10:19:45,031 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-12 10:19:45,620 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-12 10:19:46,175 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-12 10:19:46,793 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-12 10:19:46,962 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-10-12 10:19:47,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:47,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:47,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:19:47,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:47,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729416684] [2020-10-12 10:19:47,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:47,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:19:47,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303685338] [2020-10-12 10:19:47,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:19:47,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:47,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:19:47,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:19:47,165 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 18 states. [2020-10-12 10:19:50,279 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-12 10:19:50,738 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-12 10:19:51,223 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-12 10:19:51,722 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-12 10:19:52,220 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-12 10:19:52,768 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-12 10:19:53,307 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-12 10:19:53,875 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-12 10:19:54,595 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-12 10:19:55,051 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-12 10:19:55,770 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 10:19:56,226 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-12 10:19:56,931 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-12 10:19:57,648 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-12 10:19:58,157 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-12 10:19:58,752 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 10:19:59,428 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 10:20:00,120 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-12 10:20:01,131 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 10:20:01,939 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-12 10:20:02,740 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-12 10:20:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:03,651 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-10-12 10:20:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:20:03,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-12 10:20:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:03,656 INFO L225 Difference]: With dead ends: 119 [2020-10-12 10:20:03,656 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 10:20:03,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:20:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 10:20:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2020-10-12 10:20:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:20:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-10-12 10:20:03,676 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 31 [2020-10-12 10:20:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:03,677 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-10-12 10:20:03,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:20:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-10-12 10:20:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:20:03,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:03,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:03,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:20:03,678 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1824746298, now seen corresponding path program 9 times [2020-10-12 10:20:03,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:03,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720520654] [2020-10-12 10:20:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:03,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:03,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:03,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:04,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:07,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:08,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:08,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:20:08,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:20:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:20:08,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:20:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:08,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:20:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:10,182 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2020-10-12 10:20:10,418 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2020-10-12 10:20:10,897 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2020-10-12 10:20:12,338 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 117 DAG size of output: 57 [2020-10-12 10:20:13,678 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2020-10-12 10:20:15,163 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 117 DAG size of output: 58 [2020-10-12 10:20:17,744 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 115 DAG size of output: 51 [2020-10-12 10:20:23,148 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 178 DAG size of output: 68 [2020-10-12 10:20:27,051 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 157 DAG size of output: 63 [2020-10-12 10:20:30,078 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 159 DAG size of output: 65 [2020-10-12 10:20:35,074 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 126 DAG size of output: 104 [2020-10-12 10:20:40,329 WARN L193 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 137 DAG size of output: 112 [2020-10-12 10:20:45,472 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 135 DAG size of output: 110 [2020-10-12 10:20:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:46,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:46,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:46,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:46,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:20:46,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:46,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720520654] [2020-10-12 10:20:46,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:46,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:20:46,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124467214] [2020-10-12 10:20:46,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:20:46,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:20:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:20:46,263 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 21 states. [2020-10-12 10:20:46,913 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 37 [2020-10-12 10:20:47,181 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 21 [2020-10-12 10:20:47,861 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-12 10:20:48,570 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 44 [2020-10-12 10:20:49,729 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-12 10:20:52,655 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-12 10:20:53,690 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62