/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=LOWLEXORDER --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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:48:51,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:48:51,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:48:51,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:48:51,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:48:51,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:48:51,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:48:51,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:48:51,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:48:51,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:48:51,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:48:51,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:48:51,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:48:51,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:48:51,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:48:51,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:48:51,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:48:51,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:48:51,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:48:51,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:48:51,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:48:51,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:48:51,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:48:51,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:48:51,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:48:51,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:48:51,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:48:51,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:48:51,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:48:51,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:48:51,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:48:51,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:48:51,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:48:51,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:48:51,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:48:51,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:48:51,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:48:51,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:48:51,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:48:51,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:48:51,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:48:51,221 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 [2020-09-24 21:48:51,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:48:51,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:48:51,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:48:51,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:48:51,280 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:48:51,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:48:51,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:48:51,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:48:51,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:48:51,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:48:51,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:48:51,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:48:51,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:48:51,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:48:51,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:48:51,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:48:51,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:48:51,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:48:51,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:48:51,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:48:51,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:48:51,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:48:51,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:48:51,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:48:51,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:48:51,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:48:51,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:48:51,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:48:51,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:48:51,290 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:48:51,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:48:51,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:48:51,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:48:51,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:48:51,810 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:48:51,811 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 21:48:51,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ce142a18/c844e4b616d04baa80731f49f626a9cd/FLAG38abca71e [2020-09-24 21:48:52,471 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:48:52,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-24 21:48:52,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ce142a18/c844e4b616d04baa80731f49f626a9cd/FLAG38abca71e [2020-09-24 21:48:52,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ce142a18/c844e4b616d04baa80731f49f626a9cd [2020-09-24 21:48:52,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:48:52,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:48:52,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:52,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:48:52,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:48:52,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:52" (1/1) ... [2020-09-24 21:48:52,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1265ef6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:52, skipping insertion in model container [2020-09-24 21:48:52,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:52" (1/1) ... [2020-09-24 21:48:52,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:48:52,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:48:53,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:53,119 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:48:53,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:53,158 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:48:53,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53 WrapperNode [2020-09-24 21:48:53,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:53,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:48:53,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:48:53,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:48:53,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (1/1) ... [2020-09-24 21:48:53,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:48:53,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:48:53,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:48:53,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:48:53,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (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 [2020-09-24 21:48:53,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:48:53,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:48:53,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:48:53,380 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-24 21:48:53,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:48:53,380 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:48:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:48:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:48:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 21:48:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:48:53,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:48:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:48:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:48:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:48:53,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:48:53,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:48:53,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:48:53,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:48:53,694 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 21:48:53,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:48:53 BoogieIcfgContainer [2020-09-24 21:48:53,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:48:53,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:48:53,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:48:53,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:48:53,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:48:52" (1/3) ... [2020-09-24 21:48:53,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a2be11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:48:53, skipping insertion in model container [2020-09-24 21:48:53,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:53" (2/3) ... [2020-09-24 21:48:53,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a2be11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:48:53, skipping insertion in model container [2020-09-24 21:48:53,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:48:53" (3/3) ... [2020-09-24 21:48:53,710 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-24 21:48:53,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:48:53,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:48:53,794 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:48:53,822 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:48:53,822 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:48:53,822 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:48:53,822 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:48:53,822 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:48:53,823 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:48:53,823 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:48:53,823 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:48:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-24 21:48:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 21:48:53,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:53,856 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] [2020-09-24 21:48:53,856 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-24 21:48:53,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:53,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78798209] [2020-09-24 21:48:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:54,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:54,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:48:54,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:48:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-09-24 21:48:54,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 21:48:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:54,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:48:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:54,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:54,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:48:54,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:54,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 21:48:54,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:54,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:54,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:54,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:54,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:48:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:54,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:54,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:48:54,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:48:54,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:54,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:54,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 21:48:54,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:54,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:54,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78798209] [2020-09-24 21:48:54,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:48:54,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:48:54,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36517021] [2020-09-24 21:48:54,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:48:54,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:48:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:48:54,538 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-24 21:48:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:54,737 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-24 21:48:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:48:54,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-24 21:48:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:54,753 INFO L225 Difference]: With dead ends: 94 [2020-09-24 21:48:54,753 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 21:48:54,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:48:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 21:48:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-24 21:48:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 21:48:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-24 21:48:54,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-24 21:48:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:54,811 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-24 21:48:54,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:48:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-24 21:48:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 21:48:54,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:54,813 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] [2020-09-24 21:48:54,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:48:54,814 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-24 21:48:54,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:54,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537191110] [2020-09-24 21:48:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:54,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:54,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:55,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:55,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:48:55,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:48:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-09-24 21:48:55,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:55,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:48:55,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:48:55,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:48:55,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:55,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:55,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:55,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:55,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:48:55,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:55,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:48:55,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:55,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:55,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:55,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:48:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:55,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:55,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:55,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:48:55,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:55,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:48:55,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:48:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:48:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:48:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:55,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537191110] [2020-09-24 21:48:55,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:48:55,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:48:55,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300857695] [2020-09-24 21:48:55,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:48:55,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:55,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:48:55,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:48:55,356 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-24 21:48:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:55,671 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-24 21:48:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:48:55,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-24 21:48:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:55,673 INFO L225 Difference]: With dead ends: 81 [2020-09-24 21:48:55,673 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 21:48:55,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:48:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 21:48:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-24 21:48:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 21:48:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-24 21:48:55,685 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-24 21:48:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:55,686 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-24 21:48:55,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:48:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-24 21:48:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 21:48:55,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:55,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:55,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:48:55,689 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-09-24 21:48:55,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:55,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912758342] [2020-09-24 21:48:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:55,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:55,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:56,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 21:48:56,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:48:56,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-09-24 21:48:56,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:56,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:48:56,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:48:56,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:48:56,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:48:56,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:56,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:48:56,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:56,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:48:56,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:56,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:56,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:48:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:56,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:48:56,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:56,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 21:48:56,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:48:56,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:48:56,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:48:56,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:56,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912758342] [2020-09-24 21:48:56,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:48:56,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:48:56,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323657661] [2020-09-24 21:48:56,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:48:56,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:56,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:48:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:48:56,409 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-24 21:48:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:56,773 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-24 21:48:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:48:56,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-24 21:48:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:56,775 INFO L225 Difference]: With dead ends: 87 [2020-09-24 21:48:56,775 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 21:48:56,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:48:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 21:48:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-24 21:48:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 21:48:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-24 21:48:56,786 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-24 21:48:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:56,786 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-24 21:48:56,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:48:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-24 21:48:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:48:56,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:56,788 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] [2020-09-24 21:48:56,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:48:56,789 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:56,789 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-09-24 21:48:56,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:56,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384402805] [2020-09-24 21:48:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:57,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:48:57,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:48:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 642 [2020-09-24 21:48:57,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:48:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:48:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:48:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:57,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:48:57,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:57,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:48:57,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:57,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:57,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:57,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:57,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:48:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:57,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:48:57,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-24 21:48:57,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:48:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:48:57,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:48:57,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:57,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384402805] [2020-09-24 21:48:57,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:48:57,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:48:57,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153821081] [2020-09-24 21:48:57,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:48:57,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:48:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:48:57,996 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-09-24 21:48:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:58,395 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-09-24 21:48:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:48:58,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-24 21:48:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:58,397 INFO L225 Difference]: With dead ends: 93 [2020-09-24 21:48:58,398 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 21:48:58,399 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 [2020-09-24 21:48:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 21:48:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-09-24 21:48:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:48:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-24 21:48:58,408 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 41 [2020-09-24 21:48:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:58,409 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-24 21:48:58,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:48:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-24 21:48:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:48:58,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:58,411 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] [2020-09-24 21:48:58,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:48:58,411 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 946274509, now seen corresponding path program 3 times [2020-09-24 21:48:58,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:58,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979982127] [2020-09-24 21:48:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:58,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:59,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 21:48:59,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:48:59,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-09-24 21:48:59,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:48:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:48:59,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 21:48:59,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:59,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:59,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:59,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:48:59,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:59,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:48:59,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:59,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:59,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:59,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:59,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:48:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:59,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 21:48:59,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:59,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-09-24 21:48:59,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:48:59,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:48:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:48:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:48:59,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979982127] [2020-09-24 21:48:59,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:48:59,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:48:59,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891103811] [2020-09-24 21:48:59,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:48:59,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:48:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:48:59,967 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-09-24 21:49:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:00,491 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-09-24 21:49:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:49:00,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-09-24 21:49:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:00,493 INFO L225 Difference]: With dead ends: 99 [2020-09-24 21:49:00,493 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 21:49:00,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:49:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 21:49:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-09-24 21:49:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-24 21:49:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-24 21:49:00,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-09-24 21:49:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:00,515 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-24 21:49:00,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:49:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-24 21:49:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:49:00,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:00,519 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] [2020-09-24 21:49:00,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:49:00,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1531231689, now seen corresponding path program 4 times [2020-09-24 21:49:00,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:00,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772257791] [2020-09-24 21:49:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:00,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:01,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:49:01,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:01,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-09-24 21:49:01,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:01,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:49:01,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:01,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 21:49:01,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:01,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:01,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:01,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:49:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:01,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:02,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:02,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 21:49:02,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:02,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-09-24 21:49:02,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:49:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:02,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:49:02,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:02,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772257791] [2020-09-24 21:49:02,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:02,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:49:02,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118229681] [2020-09-24 21:49:02,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:49:02,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:02,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:49:02,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:49:02,559 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-09-24 21:49:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:03,229 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-09-24 21:49:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:49:03,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-09-24 21:49:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:03,231 INFO L225 Difference]: With dead ends: 105 [2020-09-24 21:49:03,231 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 21:49:03,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:49:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 21:49:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-09-24 21:49:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 21:49:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-09-24 21:49:03,244 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 53 [2020-09-24 21:49:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:03,244 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-09-24 21:49:03,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:49:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-09-24 21:49:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 21:49:03,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:03,252 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] [2020-09-24 21:49:03,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:49:03,252 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1250414021, now seen corresponding path program 5 times [2020-09-24 21:49:03,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:03,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139803539] [2020-09-24 21:49:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:03,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:03,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 21:49:04,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:04,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-09-24 21:49:04,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:49:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:49:04,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:49:04,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:04,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:04,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:49:04,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:04,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:04,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:04,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:05,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:05,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:49:05,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:05,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-09-24 21:49:05,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:05,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:49:05,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:05,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:49:05,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:05,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139803539] [2020-09-24 21:49:05,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:05,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:49:05,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814152719] [2020-09-24 21:49:05,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:49:05,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:49:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:49:05,284 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 17 states. [2020-09-24 21:49:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:05,899 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-09-24 21:49:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:49:05,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-09-24 21:49:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:05,901 INFO L225 Difference]: With dead ends: 111 [2020-09-24 21:49:05,902 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 21:49:05,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:49:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 21:49:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-09-24 21:49:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-24 21:49:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-09-24 21:49:05,920 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 59 [2020-09-24 21:49:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:05,921 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-09-24 21:49:05,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:49:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-09-24 21:49:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 21:49:05,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:05,926 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] [2020-09-24 21:49:05,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:49:05,926 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:05,927 INFO L82 PathProgramCache]: Analyzing trace with hash 195424449, now seen corresponding path program 6 times [2020-09-24 21:49:05,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:05,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913480294] [2020-09-24 21:49:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:05,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:06,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:07,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:07,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 21:49:07,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:07,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1967 [2020-09-24 21:49:07,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:49:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:07,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 21:49:07,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:07,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:07,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:07,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:07,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:07,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:07,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:49:07,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:07,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:07,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:07,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:07,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:07,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:08,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:08,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:08,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 21:49:08,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-09-24 21:49:08,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:49:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 21:49:08,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:08,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913480294] [2020-09-24 21:49:08,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:08,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:49:08,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894948244] [2020-09-24 21:49:08,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:49:08,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:49:08,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:49:08,805 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 19 states. [2020-09-24 21:49:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:09,890 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-09-24 21:49:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:49:09,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-09-24 21:49:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:09,893 INFO L225 Difference]: With dead ends: 117 [2020-09-24 21:49:09,894 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 21:49:09,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 21:49:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 21:49:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-09-24 21:49:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 21:49:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-09-24 21:49:09,920 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 65 [2020-09-24 21:49:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:09,920 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-09-24 21:49:09,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:49:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-09-24 21:49:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 21:49:09,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:09,926 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] [2020-09-24 21:49:09,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:49:09,928 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:09,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1530599747, now seen corresponding path program 7 times [2020-09-24 21:49:09,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:09,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724068762] [2020-09-24 21:49:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:12,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:12,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 21:49:12,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:12,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2456 [2020-09-24 21:49:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:49:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-24 21:49:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:12,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:12,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:12,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:12,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:12,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:49:12,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:12,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:12,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:12,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:12,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:13,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:13,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:49:13,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-09-24 21:49:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:49:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:49:13,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:13,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724068762] [2020-09-24 21:49:13,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:13,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:49:13,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383128408] [2020-09-24 21:49:13,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:49:13,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:13,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:49:13,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:49:13,923 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-09-24 21:49:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:14,733 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-09-24 21:49:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:49:14,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-09-24 21:49:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:14,736 INFO L225 Difference]: With dead ends: 123 [2020-09-24 21:49:14,736 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 21:49:14,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:49:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 21:49:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-09-24 21:49:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 21:49:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-09-24 21:49:14,760 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 71 [2020-09-24 21:49:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:14,761 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-09-24 21:49:14,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:49:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-09-24 21:49:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 21:49:14,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:14,764 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] [2020-09-24 21:49:14,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:49:14,765 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash -658870343, now seen corresponding path program 8 times [2020-09-24 21:49:14,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:14,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353115513] [2020-09-24 21:49:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:14,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:14,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:17,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:17,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 21:49:17,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:17,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2481 [2020-09-24 21:49:17,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:49:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-24 21:49:17,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:17,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:17,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:17,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:17,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:17,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:49:17,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:17,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:17,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:17,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:17,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:18,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:18,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 21:49:18,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:18,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-09-24 21:49:18,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:49:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 21:49:18,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:18,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353115513] [2020-09-24 21:49:18,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:18,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:49:18,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516262691] [2020-09-24 21:49:18,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:49:18,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:49:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:49:18,519 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 23 states. [2020-09-24 21:49:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:19,714 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-09-24 21:49:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:49:19,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-09-24 21:49:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:19,718 INFO L225 Difference]: With dead ends: 129 [2020-09-24 21:49:19,718 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 21:49:19,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=656, Invalid=1996, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 21:49:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 21:49:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-09-24 21:49:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-24 21:49:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-09-24 21:49:19,726 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 77 [2020-09-24 21:49:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:19,727 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-09-24 21:49:19,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:49:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-09-24 21:49:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 21:49:19,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:19,728 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] [2020-09-24 21:49:19,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:49:19,729 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash -485733451, now seen corresponding path program 9 times [2020-09-24 21:49:19,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:19,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355283393] [2020-09-24 21:49:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:19,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:22,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:22,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 21:49:22,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:22,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2871 [2020-09-24 21:49:22,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:22,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:49:22,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 21:49:22,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:22,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:22,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:22,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:22,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:22,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:22,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:49:22,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:22,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:22,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:23,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:23,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 21:49:23,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:23,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 897 [2020-09-24 21:49:23,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:49:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:49:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:24,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355283393] [2020-09-24 21:49:24,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:24,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 21:49:24,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373143427] [2020-09-24 21:49:24,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 21:49:24,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:24,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 21:49:24,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:49:24,023 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 25 states. [2020-09-24 21:49:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:25,447 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-09-24 21:49:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:49:25,447 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 83 [2020-09-24 21:49:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:25,448 INFO L225 Difference]: With dead ends: 135 [2020-09-24 21:49:25,448 INFO L226 Difference]: Without dead ends: 108 [2020-09-24 21:49:25,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=2396, Unknown=0, NotChecked=0, Total=3192 [2020-09-24 21:49:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-24 21:49:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-09-24 21:49:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 21:49:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-09-24 21:49:25,457 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 83 [2020-09-24 21:49:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:25,458 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-09-24 21:49:25,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 21:49:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-09-24 21:49:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 21:49:25,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:25,459 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:25,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:49:25,459 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:25,460 INFO L82 PathProgramCache]: Analyzing trace with hash 871381681, now seen corresponding path program 10 times [2020-09-24 21:49:25,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:25,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110007004] [2020-09-24 21:49:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:28,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:28,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 21:49:28,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:28,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3099 [2020-09-24 21:49:28,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:28,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:49:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:28,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 21:49:28,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:28,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:28,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:28,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:28,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:28,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:49:28,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:28,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:28,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:29,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:29,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 21:49:29,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:29,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-09-24 21:49:29,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:29,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:49:29,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:29,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 21:49:29,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:30,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110007004] [2020-09-24 21:49:30,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:30,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 21:49:30,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303336858] [2020-09-24 21:49:30,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 21:49:30,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 21:49:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:49:30,113 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 27 states. [2020-09-24 21:49:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:31,679 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2020-09-24 21:49:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 21:49:31,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 89 [2020-09-24 21:49:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:31,680 INFO L225 Difference]: With dead ends: 141 [2020-09-24 21:49:31,681 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 21:49:31,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=936, Invalid=2724, Unknown=0, NotChecked=0, Total=3660 [2020-09-24 21:49:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 21:49:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-09-24 21:49:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-24 21:49:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-09-24 21:49:31,688 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 89 [2020-09-24 21:49:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:31,688 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-09-24 21:49:31,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 21:49:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-09-24 21:49:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-24 21:49:31,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:31,690 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:31,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:49:31,690 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash 743177389, now seen corresponding path program 11 times [2020-09-24 21:49:31,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:31,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498789638] [2020-09-24 21:49:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:31,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:34,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:34,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 21:49:34,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:49:34,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3260 [2020-09-24 21:49:34,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:49:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:49:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 21:49:34,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:35,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:35,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:35,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:35,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:49:35,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:35,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:49:35,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:35,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:35,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:49:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:36,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:36,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 21:49:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:36,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498789638] [2020-09-24 21:49:36,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:36,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 21:49:36,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265770774] [2020-09-24 21:49:36,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 21:49:36,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 21:49:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:49:36,836 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 29 states. [2020-09-24 21:49:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:38,474 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2020-09-24 21:49:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:49:38,475 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-09-24 21:49:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:38,476 INFO L225 Difference]: With dead ends: 147 [2020-09-24 21:49:38,476 INFO L226 Difference]: Without dead ends: 120 [2020-09-24 21:49:38,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 21:49:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-24 21:49:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-09-24 21:49:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-24 21:49:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-09-24 21:49:38,485 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 95 [2020-09-24 21:49:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:38,485 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-09-24 21:49:38,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 21:49:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-09-24 21:49:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-24 21:49:38,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:38,486 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:38,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:49:38,487 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash -642428503, now seen corresponding path program 12 times [2020-09-24 21:49:38,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:38,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588503593] [2020-09-24 21:49:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:38,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:38,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking...