/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:40:29,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:40:29,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:40:29,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:40:29,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:40:29,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:40:29,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:40:29,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:40:29,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:40:29,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:40:29,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:40:29,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:40:29,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:40:29,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:40:29,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:40:29,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:40:29,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:40:29,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:40:29,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:40:29,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:40:29,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:40:29,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:40:29,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:40:29,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:40:29,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:40:29,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:40:29,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:40:29,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:40:29,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:40:29,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:40:29,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:40:29,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:40:29,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:40:29,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:40:29,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:40:29,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:40:29,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:40:29,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:40:29,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:40:29,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:40:29,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:40:29,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 06:40:29,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:40:29,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:40:29,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:40:29,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:40:29,704 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:40:29,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:40:29,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:40:29,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:40:29,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:40:29,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:40:29,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:40:29,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:40:29,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:40:29,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:40:29,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:40:29,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:40:29,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:40:29,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:40:29,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:40:29,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:40:29,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:40:29,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:40:29,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:40:29,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:40:29,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:40:29,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:40:29,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:40:29,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:40:29,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:40:29,710 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:40:30,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:40:30,209 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:40:30,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:40:30,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:40:30,216 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:40:30,217 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-25 06:40:30,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ed160ce/4481f7e836744a198242c83b5f8ac71c/FLAG2b07cdd58 [2020-09-25 06:40:30,836 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:40:30,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-25 06:40:30,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ed160ce/4481f7e836744a198242c83b5f8ac71c/FLAG2b07cdd58 [2020-09-25 06:40:31,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ed160ce/4481f7e836744a198242c83b5f8ac71c [2020-09-25 06:40:31,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:40:31,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:40:31,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:40:31,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:40:31,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:40:31,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6f5b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31, skipping insertion in model container [2020-09-25 06:40:31,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:40:31,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:40:31,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:40:31,540 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:40:31,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:40:31,579 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:40:31,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31 WrapperNode [2020-09-25 06:40:31,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:40:31,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:40:31,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:40:31,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:40:31,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... [2020-09-25 06:40:31,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:40:31,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:40:31,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:40:31,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:40:31,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:40:31,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:40:31,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:40:31,798 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 06:40:31,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:40:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:40:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:40:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:40:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 06:40:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:40:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 06:40:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 06:40:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:40:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:40:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:40:32,143 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:40:32,143 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 06:40:32,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:40:32 BoogieIcfgContainer [2020-09-25 06:40:32,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:40:32,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:40:32,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:40:32,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:40:32,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:40:31" (1/3) ... [2020-09-25 06:40:32,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692be0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:40:32, skipping insertion in model container [2020-09-25 06:40:32,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:40:31" (2/3) ... [2020-09-25 06:40:32,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692be0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:40:32, skipping insertion in model container [2020-09-25 06:40:32,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:40:32" (3/3) ... [2020-09-25 06:40:32,159 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-25 06:40:32,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:40:32,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:40:32,204 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:40:32,231 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:40:32,231 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:40:32,231 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:40:32,231 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:40:32,232 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:40:32,232 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:40:32,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:40:32,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:40:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-25 06:40:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 06:40:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:32,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:32,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-25 06:40:32,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:32,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831000400] [2020-09-25 06:40:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:32,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:32,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:32,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:32,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 06:40:32,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:40:32,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-25 06:40:32,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:32,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 06:40:32,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:32,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:40:32,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:32,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:32,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:32,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:32,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 06:40:32,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:32,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:32,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:32,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:32,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 06:40:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:32,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:32,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:32,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:32,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 06:40:32,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:32,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:32,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:32,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:32,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:40:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:32,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831000400] [2020-09-25 06:40:32,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:40:32,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 06:40:32,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851504766] [2020-09-25 06:40:32,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 06:40:32,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:32,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 06:40:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:40:32,889 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-25 06:40:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:33,054 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-25 06:40:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 06:40:33,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 06:40:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:33,070 INFO L225 Difference]: With dead ends: 102 [2020-09-25 06:40:33,070 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 06:40:33,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 06:40:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 06:40:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 06:40:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 06:40:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-25 06:40:33,124 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-25 06:40:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:33,125 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-25 06:40:33,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 06:40:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-25 06:40:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 06:40:33,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:33,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:33,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:40:33,128 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-25 06:40:33,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:33,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417715960] [2020-09-25 06:40:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:33,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:33,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:33,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 06:40:33,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:33,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-25 06:40:33,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:33,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:33,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:40:33,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:33,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 06:40:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:33,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:33,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:33,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:33,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:33,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:40:33,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:33,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:33,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:40:33,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-25 06:40:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:33,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:33,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:33,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:33,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 06:40:33,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:33,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:33,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:33,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:33,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:33,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:40:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:33,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417715960] [2020-09-25 06:40:33,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:40:33,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:40:33,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145587781] [2020-09-25 06:40:33,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:40:33,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:40:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:40:33,416 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-25 06:40:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:33,613 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-25 06:40:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 06:40:33,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-25 06:40:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:33,617 INFO L225 Difference]: With dead ends: 92 [2020-09-25 06:40:33,618 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 06:40:33,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:40:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 06:40:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-25 06:40:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 06:40:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-25 06:40:33,637 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-25 06:40:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:33,637 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-25 06:40:33,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:40:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-25 06:40:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 06:40:33,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:33,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:33,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:40:33,644 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-25 06:40:33,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:33,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412332182] [2020-09-25 06:40:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:33,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:33,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 06:40:33,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-09-25 06:40:33,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:33,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:33,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:40:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:33,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 06:40:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:33,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:33,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:33,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:33,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:33,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:33,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:40:33,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:33,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:33,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 06:40:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:34,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:34,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:34,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:34,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:34,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 06:40:34,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:34,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:34,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:34,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:34,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:34,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:34,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412332182] [2020-09-25 06:40:34,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:34,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 06:40:34,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826690223] [2020-09-25 06:40:34,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:40:34,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:40:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:40:34,023 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-25 06:40:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:34,226 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-25 06:40:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:40:34,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-25 06:40:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:34,229 INFO L225 Difference]: With dead ends: 102 [2020-09-25 06:40:34,229 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 06:40:34,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:40:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 06:40:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-25 06:40:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 06:40:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-25 06:40:34,239 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-25 06:40:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:34,240 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-25 06:40:34,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:40:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-25 06:40:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 06:40:34,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:34,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:34,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:40:34,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:34,243 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-25 06:40:34,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:34,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538127122] [2020-09-25 06:40:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:34,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:34,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 06:40:34,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-09-25 06:40:34,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:34,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:40:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:34,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 06:40:34,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:34,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:34,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:34,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:34,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:34,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:40:34,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:34,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:34,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:34,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 06:40:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:34,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:34,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:34,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:34,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:34,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:40:34,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:34,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:34,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:34,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:34,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:34,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538127122] [2020-09-25 06:40:34,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:34,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:40:34,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078247887] [2020-09-25 06:40:34,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:40:34,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:34,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:40:34,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:40:34,733 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-25 06:40:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:34,989 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-25 06:40:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:40:34,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-25 06:40:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:34,991 INFO L225 Difference]: With dead ends: 112 [2020-09-25 06:40:34,991 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 06:40:34,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:40:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 06:40:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-25 06:40:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 06:40:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-25 06:40:35,015 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-25 06:40:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:35,015 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-25 06:40:35,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:40:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-25 06:40:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 06:40:35,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:35,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:35,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:40:35,022 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:35,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-25 06:40:35,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:35,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692610992] [2020-09-25 06:40:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:35,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:35,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:35,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 06:40:35,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:35,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-09-25 06:40:35,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:35,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:40:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 06:40:35,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:35,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:35,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:35,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:35,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:35,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:35,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 06:40:35,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:35,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:35,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 06:40:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:35,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:35,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:35,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:35,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:35,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:40:35,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:35,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:35,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:35,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:40:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:35,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692610992] [2020-09-25 06:40:35,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:35,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 06:40:35,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546872262] [2020-09-25 06:40:35,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:40:35,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:35,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:40:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:40:35,625 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-25 06:40:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:35,857 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-25 06:40:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 06:40:35,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 06:40:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:35,861 INFO L225 Difference]: With dead ends: 122 [2020-09-25 06:40:35,861 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 06:40:35,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 06:40:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 06:40:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-25 06:40:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 06:40:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-25 06:40:35,875 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-25 06:40:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:35,876 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-25 06:40:35,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:40:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-25 06:40:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 06:40:35,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:35,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:35,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:40:35,878 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-25 06:40:35,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:35,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347511538] [2020-09-25 06:40:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:35,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:36,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:36,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 06:40:36,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-09-25 06:40:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:36,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:40:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 06:40:36,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:36,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:36,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:36,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:36,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:36,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:40:36,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:36,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:36,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:36,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:36,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:36,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 06:40:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:36,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:36,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:36,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:36,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:40:36,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:36,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:36,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:36,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347511538] [2020-09-25 06:40:36,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:36,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 06:40:36,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902697092] [2020-09-25 06:40:36,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 06:40:36,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 06:40:36,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:40:36,543 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-25 06:40:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:36,801 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-25 06:40:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 06:40:36,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-25 06:40:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:36,803 INFO L225 Difference]: With dead ends: 132 [2020-09-25 06:40:36,803 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 06:40:36,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 06:40:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 06:40:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-25 06:40:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-25 06:40:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-25 06:40:36,812 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-25 06:40:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:36,813 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-25 06:40:36,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 06:40:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-25 06:40:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 06:40:36,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:36,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:36,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 06:40:36,815 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-25 06:40:36,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:36,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517458553] [2020-09-25 06:40:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:37,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:37,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 06:40:37,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:37,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-09-25 06:40:37,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:37,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 06:40:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:37,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 06:40:37,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:37,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:37,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:37,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:37,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:37,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:37,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:40:37,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:37,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:37,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:37,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:37,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:37,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:37,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-25 06:40:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:37,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:37,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:37,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:37,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:40:37,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:37,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:37,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:37,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:37,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:37,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517458553] [2020-09-25 06:40:37,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:37,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 06:40:37,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642574456] [2020-09-25 06:40:37,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 06:40:37,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 06:40:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 06:40:37,624 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-25 06:40:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:37,996 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-25 06:40:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 06:40:37,997 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-25 06:40:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:37,999 INFO L225 Difference]: With dead ends: 142 [2020-09-25 06:40:37,999 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 06:40:38,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 06:40:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 06:40:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-25 06:40:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 06:40:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-25 06:40:38,024 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-25 06:40:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:38,027 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-25 06:40:38,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 06:40:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-25 06:40:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-25 06:40:38,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:38,033 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:38,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 06:40:38,034 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-25 06:40:38,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:38,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954427264] [2020-09-25 06:40:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:38,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:38,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-25 06:40:38,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-09-25 06:40:38,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:38,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 06:40:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:38,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 06:40:38,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:40:39,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:39,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:39,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:39,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:39,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:40:39,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:39,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:39,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:39,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:39,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:39,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:39,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-25 06:40:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:39,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:39,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:39,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:39,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:40:39,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:39,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:39,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:39,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:39,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:39,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954427264] [2020-09-25 06:40:39,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:39,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 06:40:39,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398239812] [2020-09-25 06:40:39,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 06:40:39,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 06:40:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 06:40:39,189 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-25 06:40:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:39,705 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-25 06:40:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 06:40:39,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-25 06:40:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:39,708 INFO L225 Difference]: With dead ends: 152 [2020-09-25 06:40:39,708 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 06:40:39,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 06:40:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 06:40:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-25 06:40:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 06:40:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-25 06:40:39,727 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-25 06:40:39,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:39,731 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-25 06:40:39,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 06:40:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-25 06:40:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-25 06:40:39,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:39,734 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:39,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 06:40:39,740 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-25 06:40:39,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:39,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687034280] [2020-09-25 06:40:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:39,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:40,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:40,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-25 06:40:40,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-09-25 06:40:40,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:40,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 06:40:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:40,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 06:40:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:40,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:40,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:40,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:40,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:40,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:40,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:40:40,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:40,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:40,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:40,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:40,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:40,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-25 06:40:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:41,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:41,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:41,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:41,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:40:41,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:41,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:41,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:41,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:41,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:41,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:41,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687034280] [2020-09-25 06:40:41,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:41,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 06:40:41,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96587597] [2020-09-25 06:40:41,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 06:40:41,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 06:40:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:40:41,030 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-25 06:40:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:41,496 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-25 06:40:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 06:40:41,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-25 06:40:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:41,498 INFO L225 Difference]: With dead ends: 162 [2020-09-25 06:40:41,498 INFO L226 Difference]: Without dead ends: 132 [2020-09-25 06:40:41,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-25 06:40:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-25 06:40:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-25 06:40:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-25 06:40:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-25 06:40:41,514 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-25 06:40:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:41,515 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-25 06:40:41,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 06:40:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-25 06:40:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-25 06:40:41,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:41,517 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:41,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 06:40:41,518 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-25 06:40:41,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:41,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638915448] [2020-09-25 06:40:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:41,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:42,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:42,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-25 06:40:42,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:42,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-09-25 06:40:42,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:42,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:42,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 06:40:42,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:42,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 06:40:42,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:43,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:43,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:43,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:43,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:43,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:43,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:40:43,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:43,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:43,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:43,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:43,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:43,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:43,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-25 06:40:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:43,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:43,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:43,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:43,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:43,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:40:43,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:43,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:43,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:43,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:43,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638915448] [2020-09-25 06:40:43,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:43,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 06:40:43,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260295352] [2020-09-25 06:40:43,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 06:40:43,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 06:40:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-25 06:40:43,181 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-25 06:40:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:43,697 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-25 06:40:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 06:40:43,698 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-25 06:40:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:43,699 INFO L225 Difference]: With dead ends: 172 [2020-09-25 06:40:43,699 INFO L226 Difference]: Without dead ends: 142 [2020-09-25 06:40:43,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 06:40:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-25 06:40:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-25 06:40:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 06:40:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-25 06:40:43,707 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-25 06:40:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:43,708 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-25 06:40:43,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 06:40:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-25 06:40:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-25 06:40:43,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:43,710 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:43,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 06:40:43,711 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-25 06:40:43,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:43,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889204558] [2020-09-25 06:40:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:43,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:45,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:45,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-25 06:40:45,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:45,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-09-25 06:40:45,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:45,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:45,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 06:40:45,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:45,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 06:40:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:45,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:45,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:45,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:45,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:40:45,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:45,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:45,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:45,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:45,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:45,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:45,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-25 06:40:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:45,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:45,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:45,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:45,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:40:45,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:45,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:45,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:45,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889204558] [2020-09-25 06:40:45,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:45,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 06:40:45,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437579438] [2020-09-25 06:40:45,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 06:40:45,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 06:40:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-25 06:40:45,507 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-25 06:40:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:46,058 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-25 06:40:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 06:40:46,059 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-25 06:40:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:46,060 INFO L225 Difference]: With dead ends: 182 [2020-09-25 06:40:46,061 INFO L226 Difference]: Without dead ends: 152 [2020-09-25 06:40:46,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 06:40:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-25 06:40:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-25 06:40:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-25 06:40:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-25 06:40:46,071 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-25 06:40:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:46,072 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-25 06:40:46,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 06:40:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-25 06:40:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-25 06:40:46,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:46,073 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:46,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 06:40:46,074 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-25 06:40:46,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:46,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115997071] [2020-09-25 06:40:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:47,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:47,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-25 06:40:47,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:47,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1572 [2020-09-25 06:40:47,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:47,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 06:40:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-25 06:40:47,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:47,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:47,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:47,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:47,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:47,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 06:40:47,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:47,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:47,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:47,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-25 06:40:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:48,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:48,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:48,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:48,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:40:48,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:48,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:48,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:48,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:48,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:48,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115997071] [2020-09-25 06:40:48,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:48,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 06:40:48,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690667485] [2020-09-25 06:40:48,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 06:40:48,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:48,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 06:40:48,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-25 06:40:48,030 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-25 06:40:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:48,671 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-25 06:40:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 06:40:48,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-25 06:40:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:48,673 INFO L225 Difference]: With dead ends: 192 [2020-09-25 06:40:48,673 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 06:40:48,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 06:40:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 06:40:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-25 06:40:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-25 06:40:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-25 06:40:48,681 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-25 06:40:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:48,682 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-25 06:40:48,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 06:40:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-25 06:40:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-25 06:40:48,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:48,684 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:48,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 06:40:48,684 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-25 06:40:48,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:48,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767503582] [2020-09-25 06:40:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:48,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:50,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:50,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 06:40:50,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1900 [2020-09-25 06:40:50,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:50,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 06:40:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-25 06:40:50,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:50,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:50,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:50,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:50,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:50,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:40:50,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:50,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:50,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:50,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-25 06:40:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:50,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:50,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:50,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:50,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:40:50,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:50,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:50,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:50,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:51,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767503582] [2020-09-25 06:40:51,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:51,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 06:40:51,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62368042] [2020-09-25 06:40:51,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 06:40:51,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:51,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 06:40:51,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-25 06:40:51,017 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-25 06:40:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:51,702 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-25 06:40:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 06:40:51,702 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-25 06:40:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:51,704 INFO L225 Difference]: With dead ends: 202 [2020-09-25 06:40:51,704 INFO L226 Difference]: Without dead ends: 172 [2020-09-25 06:40:51,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 06:40:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-25 06:40:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-25 06:40:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-25 06:40:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-25 06:40:51,711 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-25 06:40:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:51,712 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-25 06:40:51,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 06:40:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-25 06:40:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-25 06:40:51,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:51,714 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:51,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 06:40:51,714 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-25 06:40:51,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:51,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970870257] [2020-09-25 06:40:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:51,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:53,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:53,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-25 06:40:53,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:53,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-09-25 06:40:53,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:53,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 06:40:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 06:40:53,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:40:54,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:54,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:54,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:54,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:54,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:40:54,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:54,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:54,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:54,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-25 06:40:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:54,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:54,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:54,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:54,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:54,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 06:40:54,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:54,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:54,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:54,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:54,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970870257] [2020-09-25 06:40:54,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:54,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 06:40:54,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741912443] [2020-09-25 06:40:54,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 06:40:54,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 06:40:54,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-25 06:40:54,367 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-25 06:40:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:55,269 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-25 06:40:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 06:40:55,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-25 06:40:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:55,271 INFO L225 Difference]: With dead ends: 212 [2020-09-25 06:40:55,272 INFO L226 Difference]: Without dead ends: 182 [2020-09-25 06:40:55,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 06:40:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-25 06:40:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-25 06:40:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-25 06:40:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-25 06:40:55,279 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-25 06:40:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:55,279 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-25 06:40:55,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 06:40:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-25 06:40:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-25 06:40:55,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:55,281 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:55,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 06:40:55,282 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-25 06:40:55,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:55,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400259507] [2020-09-25 06:40:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:55,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:57,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:57,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-25 06:40:57,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2384 [2020-09-25 06:40:57,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:57,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 06:40:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:40:57,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-25 06:40:57,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:40:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:58,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:58,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:58,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:58,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:58,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:40:58,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:58,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:58,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:58,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-25 06:40:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:58,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:58,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:40:58,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:58,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:40:58,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:58,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:58,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:58,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:40:58,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:58,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:40:58,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400259507] [2020-09-25 06:40:58,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:58,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 06:40:58,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388458186] [2020-09-25 06:40:58,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 06:40:58,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 06:40:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-25 06:40:58,194 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-25 06:40:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:59,208 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-25 06:40:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 06:40:59,209 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-25 06:40:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:59,211 INFO L225 Difference]: With dead ends: 222 [2020-09-25 06:40:59,211 INFO L226 Difference]: Without dead ends: 192 [2020-09-25 06:40:59,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 06:40:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-25 06:40:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-25 06:40:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 06:40:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-25 06:40:59,223 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-25 06:40:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:59,223 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-25 06:40:59,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 06:40:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-25 06:40:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-25 06:40:59,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:59,225 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:59,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 06:40:59,226 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-25 06:40:59,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:59,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061688824] [2020-09-25 06:40:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:01,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:01,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 06:41:01,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:01,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2603 [2020-09-25 06:41:01,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:01,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:01,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 06:41:01,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:41:01,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 06:41:01,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:02,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:41:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:02,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:02,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:02,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:41:02,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:02,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:41:02,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:02,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:41:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:02,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-25 06:41:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:02,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:02,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:02,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:41:02,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:02,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:41:02,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:02,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:02,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:02,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:41:02,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:02,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:41:02,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061688824] [2020-09-25 06:41:02,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:41:02,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 06:41:02,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754621069] [2020-09-25 06:41:02,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 06:41:02,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:41:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 06:41:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-25 06:41:02,330 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-25 06:41:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:41:03,117 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-25 06:41:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 06:41:03,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-25 06:41:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:41:03,119 INFO L225 Difference]: With dead ends: 232 [2020-09-25 06:41:03,119 INFO L226 Difference]: Without dead ends: 202 [2020-09-25 06:41:03,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 06:41:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-25 06:41:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-25 06:41:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-25 06:41:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-25 06:41:03,129 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-25 06:41:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:41:03,129 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-25 06:41:03,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 06:41:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-25 06:41:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-25 06:41:03,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:41:03,132 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:41:03,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 06:41:03,132 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:41:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:41:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-25 06:41:03,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:41:03,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023830006] [2020-09-25 06:41:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:41:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:03,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:06,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:06,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 06:41:06,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:06,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2942 [2020-09-25 06:41:06,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:06,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:06,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 06:41:06,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:41:06,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-25 06:41:06,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:06,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:41:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:06,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:06,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:06,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:41:06,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:06,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-25 06:41:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:06,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:06,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:06,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:41:06,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:06,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:41:06,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:06,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:41:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:41:06,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023830006] [2020-09-25 06:41:06,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:41:06,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 06:41:06,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595823101] [2020-09-25 06:41:06,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 06:41:06,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:41:06,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 06:41:06,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 06:41:06,799 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-25 06:41:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:41:07,976 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-25 06:41:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-25 06:41:07,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-25 06:41:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:41:07,979 INFO L225 Difference]: With dead ends: 242 [2020-09-25 06:41:07,979 INFO L226 Difference]: Without dead ends: 212 [2020-09-25 06:41:07,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 06:41:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-25 06:41:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-25 06:41:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-25 06:41:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-25 06:41:07,986 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-25 06:41:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:41:07,987 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-25 06:41:07,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 06:41:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-25 06:41:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 06:41:07,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:41:07,989 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:41:07,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 06:41:07,990 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:41:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:41:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-25 06:41:07,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:41:07,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898271667] [2020-09-25 06:41:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:41:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:08,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2930 [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:10,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 06:41:10,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:41:10,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-25 06:41:10,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:11,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:41:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:11,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:11,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:41:11,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:11,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:41:11,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:11,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:11,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:41:11,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:11,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-25 06:41:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:11,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:11,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:41:11,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:11,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:41:11,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898271667] [2020-09-25 06:41:11,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:41:11,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 06:41:11,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495881468] [2020-09-25 06:41:11,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 06:41:11,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:41:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 06:41:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 06:41:11,701 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-25 06:41:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:41:13,069 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-25 06:41:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-25 06:41:13,070 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-25 06:41:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:41:13,072 INFO L225 Difference]: With dead ends: 252 [2020-09-25 06:41:13,072 INFO L226 Difference]: Without dead ends: 222 [2020-09-25 06:41:13,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 06:41:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-25 06:41:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-25 06:41:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-25 06:41:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-25 06:41:13,082 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-25 06:41:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:41:13,082 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-25 06:41:13,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-25 06:41:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-25 06:41:13,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 06:41:13,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:41:13,091 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:41:13,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 06:41:13,092 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:41:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:41:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-25 06:41:13,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:41:13,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721564000] [2020-09-25 06:41:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:41:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:13,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:16,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:41:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-25 06:41:16,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:16,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:41:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:16,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:16,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:16,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:41:16,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:16,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:41:16,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-25 06:41:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:16,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:41:17,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:41:17,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:41:17,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:41:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:41:17,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:41:17,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:41:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:41:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 06:41:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:41:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:41:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:41:17,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721564000] [2020-09-25 06:41:17,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:41:17,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-25 06:41:17,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027598054] [2020-09-25 06:41:17,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-25 06:41:17,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:41:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-25 06:41:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 06:41:17,040 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-25 06:41:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:41:18,600 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-25 06:41:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-25 06:41:18,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-25 06:41:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:41:18,603 INFO L225 Difference]: With dead ends: 262 [2020-09-25 06:41:18,603 INFO L226 Difference]: Without dead ends: 232 [2020-09-25 06:41:18,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-25 06:41:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-25 06:41:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-25 06:41:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-25 06:41:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-25 06:41:18,616 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-25 06:41:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:41:18,617 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-25 06:41:18,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-25 06:41:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-25 06:41:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-25 06:41:18,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:41:18,618 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:41:18,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 06:41:18,619 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:41:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:41:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-25 06:41:18,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:41:18,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283614543] [2020-09-25 06:41:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:41:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:41:18,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking...