/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 SingleStatement --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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:25:38,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:25:38,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:25:38,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:25:38,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:25:38,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:25:38,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:25:38,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:25:38,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:25:38,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:25:38,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:25:38,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:25:38,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:25:38,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:25:38,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:25:38,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:25:38,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:25:38,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:25:38,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:25:38,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:25:38,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:25:38,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:25:38,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:25:38,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:25:38,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:25:38,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:25:38,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:25:38,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:25:38,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:25:38,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:25:38,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:25:38,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:25:38,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:25:38,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:25:38,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:25:38,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:25:38,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:25:38,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:25:38,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:25:38,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:25:38,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:25:38,180 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 [2020-09-25 03:25:38,207 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:25:38,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:25:38,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:25:38,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:25:38,209 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:25:38,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:25:38,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:25:38,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:25:38,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:25:38,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:25:38,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:25:38,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:25:38,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:25:38,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:25:38,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:25:38,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:25:38,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:25:38,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:25:38,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:25:38,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:25:38,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:25:38,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:25:38,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:25:38,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:25:38,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:25:38,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:25:38,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:25:38,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:25:38,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:25:38,215 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 -> SingleStatement 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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=true; [2020-09-25 03:25:38,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:25:38,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:25:38,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:25:38,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:25:38,712 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:25:38,713 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 03:25:38,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be477b9ac/4826a8c7fe15468c9c10506731452f77/FLAG57819d454 [2020-09-25 03:25:39,374 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:25:39,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 03:25:39,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be477b9ac/4826a8c7fe15468c9c10506731452f77/FLAG57819d454 [2020-09-25 03:25:39,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be477b9ac/4826a8c7fe15468c9c10506731452f77 [2020-09-25 03:25:39,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:25:39,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:25:39,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:25:39,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:25:39,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:25:39,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:25:39" (1/1) ... [2020-09-25 03:25:39,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:39, skipping insertion in model container [2020-09-25 03:25:39,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:25:39" (1/1) ... [2020-09-25 03:25:39,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:25:39,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:25:40,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:25:40,034 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:25:40,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:25:40,072 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:25:40,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40 WrapperNode [2020-09-25 03:25:40,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:25:40,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:25:40,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:25:40,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:25:40,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (1/1) ... [2020-09-25 03:25:40,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:25:40,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:25:40,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:25:40,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:25:40,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (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 [2020-09-25 03:25:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:25:40,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:25:40,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:25:40,281 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 03:25:40,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:25:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:25:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:25:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 03:25:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 03:25:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 03:25:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 03:25:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 03:25:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:25:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 03:25:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 03:25:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:25:40,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:25:40,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:25:40,580 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:25:40,581 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 03:25:40,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:25:40 BoogieIcfgContainer [2020-09-25 03:25:40,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:25:40,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:25:40,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:25:40,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:25:40,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:25:39" (1/3) ... [2020-09-25 03:25:40,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7643ceb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:25:40, skipping insertion in model container [2020-09-25 03:25:40,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:25:40" (2/3) ... [2020-09-25 03:25:40,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7643ceb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:25:40, skipping insertion in model container [2020-09-25 03:25:40,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:25:40" (3/3) ... [2020-09-25 03:25:40,597 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 03:25:40,611 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:25:40,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:25:40,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:25:40,683 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:25:40,684 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:25:40,684 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:25:40,684 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:25:40,684 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:25:40,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:25:40,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:25:40,685 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:25:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 03:25:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 03:25:40,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:40,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:40,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 03:25:40,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:40,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774416993] [2020-09-25 03:25:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:40,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:40,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:41,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:41,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 03:25:41,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:25:41,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-25 03:25:41,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:25:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 03:25:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 03:25:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:25:41,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:25:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:41,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:41,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:25:41,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:25:41,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:41,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:25:41,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:41,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:25:41,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:25:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:41,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:41,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:41,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:41,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:25:41,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:25:41,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 03:25:41,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:41,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:41,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 03:25:41,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:41,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:25:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:25:41,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774416993] [2020-09-25 03:25:41,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:25:41,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:25:41,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229318780] [2020-09-25 03:25:41,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:25:41,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:25:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:25:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:25:41,485 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 03:25:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:25:41,771 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 03:25:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:25:41,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 03:25:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:25:41,791 INFO L225 Difference]: With dead ends: 109 [2020-09-25 03:25:41,791 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 03:25:41,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:25:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 03:25:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 03:25:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 03:25:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 03:25:41,865 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 03:25:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:25:41,865 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 03:25:41,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:25:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 03:25:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 03:25:41,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:41,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:41,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:25:41,869 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 03:25:41,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:41,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702269999] [2020-09-25 03:25:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:41,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:42,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:43,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:43,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 03:25:43,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:25:43,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1888 [2020-09-25 03:25:43,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:25:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 03:25:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 03:25:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:25:43,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:25:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:43,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:43,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:25:43,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:43,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:25:43,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:44,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:25:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:44,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:25:44,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:25:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:44,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:44,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:44,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 03:25:44,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:25:44,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 03:25:44,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:44,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:25:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:25:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 03:25:44,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:25:44,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702269999] [2020-09-25 03:25:44,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:25:44,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 03:25:44,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147894901] [2020-09-25 03:25:44,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 03:25:44,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:25:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 03:25:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:25:44,149 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-09-25 03:25:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:25:44,960 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-09-25 03:25:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 03:25:44,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-25 03:25:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:25:44,963 INFO L225 Difference]: With dead ends: 128 [2020-09-25 03:25:44,963 INFO L226 Difference]: Without dead ends: 100 [2020-09-25 03:25:44,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-25 03:25:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-25 03:25:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-09-25 03:25:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 03:25:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-09-25 03:25:44,979 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 36 [2020-09-25 03:25:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:25:44,980 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-09-25 03:25:44,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 03:25:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-09-25 03:25:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 03:25:44,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:44,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:44,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:25:44,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1998641845, now seen corresponding path program 1 times [2020-09-25 03:25:44,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:44,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202049981] [2020-09-25 03:25:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:45,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:45,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:46,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:46,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 03:25:46,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:25:46,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1432 [2020-09-25 03:25:46,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:46,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:25:46,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:25:46,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 03:25:46,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:46,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:25:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:46,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:46,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:25:46,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:46,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:25:46,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:46,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:46,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:25:46,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:46,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:46,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:25:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:46,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:46,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:46,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 03:25:46,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 03:25:46,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:25:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:25:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 03:25:46,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:25:46,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202049981] [2020-09-25 03:25:46,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:25:46,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:25:46,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184181685] [2020-09-25 03:25:46,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:25:46,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:25:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:25:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:25:46,699 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 9 states. [2020-09-25 03:25:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:25:46,975 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-09-25 03:25:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 03:25:46,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 03:25:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:25:46,977 INFO L225 Difference]: With dead ends: 129 [2020-09-25 03:25:46,978 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 03:25:46,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:25:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 03:25:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-09-25 03:25:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 03:25:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-25 03:25:46,989 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-25 03:25:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:25:46,989 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-25 03:25:46,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:25:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-25 03:25:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 03:25:46,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:46,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:46,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:25:46,992 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:46,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1456554063, now seen corresponding path program 2 times [2020-09-25 03:25:46,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:46,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988423559] [2020-09-25 03:25:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:47,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:49,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:49,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 03:25:49,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:25:49,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2568 [2020-09-25 03:25:49,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:49,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:25:49,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:25:49,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 03:25:49,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:49,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:25:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:49,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:49,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:49,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:25:49,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:49,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:25:49,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:49,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:25:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:49,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:49,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:25:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:49,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:49,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 03:25:49,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:49,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-25 03:25:49,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:25:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:25:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 03:25:49,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:25:50,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988423559] [2020-09-25 03:25:50,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:25:50,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 03:25:50,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667422211] [2020-09-25 03:25:50,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 03:25:50,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:25:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 03:25:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 03:25:50,032 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 11 states. [2020-09-25 03:25:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:25:50,399 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-09-25 03:25:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 03:25:50,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-25 03:25:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:25:50,401 INFO L225 Difference]: With dead ends: 135 [2020-09-25 03:25:50,401 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 03:25:50,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:25:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 03:25:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-09-25 03:25:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 03:25:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-09-25 03:25:50,412 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 49 [2020-09-25 03:25:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:25:50,413 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-09-25 03:25:50,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 03:25:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-09-25 03:25:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 03:25:50,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:50,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:50,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:25:50,415 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2095314861, now seen corresponding path program 3 times [2020-09-25 03:25:50,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:50,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599884826] [2020-09-25 03:25:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:50,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:50,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:50,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:53,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:53,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 03:25:53,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:25:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3317 [2020-09-25 03:25:53,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:25:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:25:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 03:25:53,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:53,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:25:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:53,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:53,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:53,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:25:53,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:25:53,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:25:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:53,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:25:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:53,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:53,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:53,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 03:25:53,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-25 03:25:53,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 03:25:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:25:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 03:25:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:25:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:25:54,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599884826] [2020-09-25 03:25:54,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:25:54,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 03:25:54,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72859931] [2020-09-25 03:25:54,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 03:25:54,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:25:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 03:25:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-25 03:25:54,112 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 13 states. [2020-09-25 03:25:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:25:54,573 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2020-09-25 03:25:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:25:54,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-25 03:25:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:25:54,577 INFO L225 Difference]: With dead ends: 141 [2020-09-25 03:25:54,577 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 03:25:54,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-25 03:25:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 03:25:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-09-25 03:25:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 03:25:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-09-25 03:25:54,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 55 [2020-09-25 03:25:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:25:54,598 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-09-25 03:25:54,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 03:25:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-09-25 03:25:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 03:25:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:54,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:54,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:25:54,603 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2117485225, now seen corresponding path program 4 times [2020-09-25 03:25:54,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:54,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171456478] [2020-09-25 03:25:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:54,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:54,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:54,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:58,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:58,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 03:25:58,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:25:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4089 [2020-09-25 03:25:58,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:25:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:25:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 03:25:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:58,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:25:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:58,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:58,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:58,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:25:58,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:58,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:25:58,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:25:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:25:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:25:58,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:25:58,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:25:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:58,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:59,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:25:59,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 03:25:59,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:25:59,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-09-25 03:25:59,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:25:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 03:25:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:25:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 03:25:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:25:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:25:59,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171456478] [2020-09-25 03:25:59,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:25:59,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 03:25:59,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931323341] [2020-09-25 03:25:59,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 03:25:59,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:25:59,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 03:25:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:25:59,227 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 15 states. [2020-09-25 03:25:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:25:59,759 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2020-09-25 03:25:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 03:25:59,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-25 03:25:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:25:59,763 INFO L225 Difference]: With dead ends: 147 [2020-09-25 03:25:59,764 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 03:25:59,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-25 03:25:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 03:25:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-09-25 03:25:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-25 03:25:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-09-25 03:25:59,785 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2020-09-25 03:25:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:25:59,786 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-09-25 03:25:59,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 03:25:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-09-25 03:25:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 03:25:59,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:25:59,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:25:59,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:25:59,790 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:25:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:25:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1506500773, now seen corresponding path program 5 times [2020-09-25 03:25:59,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:25:59,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127987407] [2020-09-25 03:25:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:25:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:25:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:25:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:04,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:04,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 03:26:04,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:04,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4896 [2020-09-25 03:26:04,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:26:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:26:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 03:26:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:04,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:04,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:04,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:04,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:04,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:04,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:26:04,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:04,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:26:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:05,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:05,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 03:26:05,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-09-25 03:26:05,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:26:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:26:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 03:26:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:05,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127987407] [2020-09-25 03:26:05,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:05,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 03:26:05,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650419660] [2020-09-25 03:26:05,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 03:26:05,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:05,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 03:26:05,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:26:05,348 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 17 states. [2020-09-25 03:26:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:06,016 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-09-25 03:26:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 03:26:06,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-09-25 03:26:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:06,018 INFO L225 Difference]: With dead ends: 153 [2020-09-25 03:26:06,018 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 03:26:06,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 03:26:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 03:26:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-09-25 03:26:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 03:26:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-09-25 03:26:06,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 67 [2020-09-25 03:26:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:06,028 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-09-25 03:26:06,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 03:26:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-09-25 03:26:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 03:26:06,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:06,029 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:06,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:26:06,030 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1728507487, now seen corresponding path program 6 times [2020-09-25 03:26:06,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:06,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915966242] [2020-09-25 03:26:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:06,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:07,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:10,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:10,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 03:26:10,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4305 [2020-09-25 03:26:10,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:26:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:26:10,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 03:26:10,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:10,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:10,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:10,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:26:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:10,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:10,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 03:26:10,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:10,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-09-25 03:26:10,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 03:26:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:26:10,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 03:26:10,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:11,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915966242] [2020-09-25 03:26:11,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:11,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 03:26:11,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229470875] [2020-09-25 03:26:11,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 03:26:11,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 03:26:11,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:26:11,165 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 19 states. [2020-09-25 03:26:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:11,937 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-09-25 03:26:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 03:26:11,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-09-25 03:26:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:11,939 INFO L225 Difference]: With dead ends: 159 [2020-09-25 03:26:11,940 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 03:26:11,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 03:26:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 03:26:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-09-25 03:26:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 03:26:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-09-25 03:26:11,949 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 73 [2020-09-25 03:26:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:11,949 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-09-25 03:26:11,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 03:26:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-09-25 03:26:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 03:26:11,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:11,951 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:11,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:26:11,951 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:11,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1573197213, now seen corresponding path program 7 times [2020-09-25 03:26:11,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:11,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780069516] [2020-09-25 03:26:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:11,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:13,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:16,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:16,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 03:26:16,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 03:26:16,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 03:26:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:26:16,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 03:26:16,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:17,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:17,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:17,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:17,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:17,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:26:17,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:17,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:26:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:17,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:17,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:26:17,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 03:26:17,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:18,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780069516] [2020-09-25 03:26:18,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:18,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 03:26:18,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058011450] [2020-09-25 03:26:18,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 03:26:18,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 03:26:18,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-25 03:26:18,340 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 21 states. [2020-09-25 03:26:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:19,302 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-09-25 03:26:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 03:26:19,303 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-09-25 03:26:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:19,304 INFO L225 Difference]: With dead ends: 165 [2020-09-25 03:26:19,304 INFO L226 Difference]: Without dead ends: 117 [2020-09-25 03:26:19,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 03:26:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-25 03:26:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-09-25 03:26:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 03:26:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-25 03:26:19,313 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 79 [2020-09-25 03:26:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:19,313 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-25 03:26:19,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 03:26:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-25 03:26:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 03:26:19,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:19,315 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:19,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:26:19,315 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:19,316 INFO L82 PathProgramCache]: Analyzing trace with hash 518335641, now seen corresponding path program 8 times [2020-09-25 03:26:19,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:19,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897463210] [2020-09-25 03:26:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:21,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:24,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 03:26:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 03:26:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:26:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:24,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:24,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:26:24,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:26:24,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:26:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:26:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:26:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 03:26:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:25,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:26:25,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 03:26:25,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:26:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-09-25 03:26:25,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:26:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 03:26:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 03:26:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 03:26:25,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:26:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:26:26,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897463210] [2020-09-25 03:26:26,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:26:26,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 03:26:26,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516302483] [2020-09-25 03:26:26,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 03:26:26,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:26:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 03:26:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:26:26,034 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 23 states. [2020-09-25 03:26:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:26:27,096 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-09-25 03:26:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 03:26:27,097 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-09-25 03:26:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:26:27,099 INFO L225 Difference]: With dead ends: 171 [2020-09-25 03:26:27,099 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 03:26:27,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 03:26:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 03:26:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-09-25 03:26:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-25 03:26:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-09-25 03:26:27,107 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 85 [2020-09-25 03:26:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:26:27,108 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-09-25 03:26:27,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 03:26:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-09-25 03:26:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 03:26:27,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:26:27,109 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:26:27,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:26:27,110 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:26:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:26:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1673467541, now seen corresponding path program 9 times [2020-09-25 03:26:27,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:26:27,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814471838] [2020-09-25 03:26:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:26:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:26:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:27,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:26:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking...