/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:57:16,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:57:16,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:57:16,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:57:16,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:57:16,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:57:16,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:57:16,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:57:16,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:57:16,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:57:16,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:57:16,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:57:16,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:57:16,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:57:16,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:57:16,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:57:16,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:57:16,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:57:16,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:57:16,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:57:16,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:57:16,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:57:16,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:57:16,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:57:16,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:57:16,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:57:16,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:57:16,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:57:16,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:57:16,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:57:16,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:57:16,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:57:16,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:57:16,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:57:16,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:57:16,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:57:16,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:57:16,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:57:16,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:57:16,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:57:16,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:57:16,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 22:57:16,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:57:16,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:57:16,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:57:16,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:57:16,242 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:57:16,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:57:16,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:57:16,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:57:16,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:57:16,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:57:16,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:57:16,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:57:16,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:57:16,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:57:16,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:57:16,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:57:16,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:57:16,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:57:16,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:57:16,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:57:16,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:57:16,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:57:16,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:57:16,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:57:16,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:57:16,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:57:16,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:57:16,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:57:16,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:57:16,249 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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:57:16,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:57:16,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:57:16,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:57:16,760 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:57:16,760 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:57:16,761 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 22:57:16,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4af89e4d/02468184565a49de8ed128ad6f147812/FLAGeedb71246 [2020-09-24 22:57:17,374 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:57:17,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-24 22:57:17,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4af89e4d/02468184565a49de8ed128ad6f147812/FLAGeedb71246 [2020-09-24 22:57:17,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e4af89e4d/02468184565a49de8ed128ad6f147812 [2020-09-24 22:57:17,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:57:17,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:57:17,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:57:17,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:57:17,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:57:17,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:57:17" (1/1) ... [2020-09-24 22:57:17,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19701add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:17, skipping insertion in model container [2020-09-24 22:57:17,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:57:17" (1/1) ... [2020-09-24 22:57:17,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:57:17,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:57:18,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:57:18,137 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:57:18,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:57:18,361 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:57:18,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18 WrapperNode [2020-09-24 22:57:18,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:57:18,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:57:18,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:57:18,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:57:18,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... [2020-09-24 22:57:18,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:57:18,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:57:18,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:57:18,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:57:18,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:57:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:57:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:57:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:57:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:57:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-24 22:57:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-24 22:57:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:57:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 22:57:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:57:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:57:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 22:57:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 22:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 22:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:57:19,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:57:19,499 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:57:19,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:57:19 BoogieIcfgContainer [2020-09-24 22:57:19,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:57:19,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:57:19,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:57:19,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:57:19,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:57:17" (1/3) ... [2020-09-24 22:57:19,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff72e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:57:19, skipping insertion in model container [2020-09-24 22:57:19,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:57:18" (2/3) ... [2020-09-24 22:57:19,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff72e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:57:19, skipping insertion in model container [2020-09-24 22:57:19,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:57:19" (3/3) ... [2020-09-24 22:57:19,517 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-24 22:57:19,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:57:19,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:57:19,562 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:57:19,595 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:57:19,595 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:57:19,596 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:57:19,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:57:19,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:57:19,596 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:57:19,596 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:57:19,596 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:57:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-09-24 22:57:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 22:57:19,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:19,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:19,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:19,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-09-24 22:57:19,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:19,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102070201] [2020-09-24 22:57:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:20,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:21,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:21,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 22:57:21,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:21,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-09-24 22:57:21,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:21,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:57:21,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 317 [2020-09-24 22:57:21,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:57:21,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:57:21,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:21,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:21,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:21,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 22:57:21,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:21,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:21,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:21,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102070201] [2020-09-24 22:57:21,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:57:21,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 22:57:21,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540486409] [2020-09-24 22:57:21,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:57:21,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:21,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:57:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:57:21,791 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-09-24 22:57:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:22,530 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-09-24 22:57:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 22:57:22,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-09-24 22:57:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:22,550 INFO L225 Difference]: With dead ends: 386 [2020-09-24 22:57:22,551 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 22:57:22,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:57:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 22:57:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-09-24 22:57:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-24 22:57:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-09-24 22:57:22,624 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-09-24 22:57:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:22,626 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-09-24 22:57:22,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:57:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-09-24 22:57:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 22:57:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:22,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:22,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:57:22,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-09-24 22:57:22,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:22,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152413638] [2020-09-24 22:57:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:22,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:23,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:23,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 22:57:23,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-09-24 22:57:23,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:23,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:57:23,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:57:23,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 22:57:23,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:23,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:23,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:23,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:23,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:23,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 22:57:23,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:23,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:23,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:23,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152413638] [2020-09-24 22:57:23,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:57:23,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 22:57:23,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049617506] [2020-09-24 22:57:23,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 22:57:23,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 22:57:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:57:23,773 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-09-24 22:57:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:24,427 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-09-24 22:57:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 22:57:24,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-24 22:57:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:24,439 INFO L225 Difference]: With dead ends: 374 [2020-09-24 22:57:24,440 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 22:57:24,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:57:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 22:57:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-24 22:57:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-24 22:57:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-09-24 22:57:24,488 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-09-24 22:57:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:24,492 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-09-24 22:57:24,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 22:57:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-09-24 22:57:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 22:57:24,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:24,516 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:24,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:57:24,517 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-09-24 22:57:24,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:24,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749607328] [2020-09-24 22:57:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:24,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:27,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:27,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-09-24 22:57:27,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:57:27,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2775 [2020-09-24 22:57:27,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:57:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:57:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 22:57:27,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:57:27,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:27,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:27,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:27,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:27,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 22:57:27,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:27,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:27,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749607328] [2020-09-24 22:57:27,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:27,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:57:27,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096612131] [2020-09-24 22:57:27,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:57:27,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:57:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:57:27,737 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-09-24 22:57:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:28,514 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-09-24 22:57:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:57:28,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-24 22:57:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:28,520 INFO L225 Difference]: With dead ends: 391 [2020-09-24 22:57:28,520 INFO L226 Difference]: Without dead ends: 366 [2020-09-24 22:57:28,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:57:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-24 22:57:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-24 22:57:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-24 22:57:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-24 22:57:28,534 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-09-24 22:57:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:28,535 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-24 22:57:28,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:57:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-24 22:57:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-24 22:57:28,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:28,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:28,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:57:28,544 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-09-24 22:57:28,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:28,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323862685] [2020-09-24 22:57:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:30,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:33,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:33,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-09-24 22:57:33,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:57:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-09-24 22:57:33,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 22:57:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:57:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 22:57:33,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:33,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:33,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:33,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 22:57:33,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:33,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:33,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 22:57:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:34,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323862685] [2020-09-24 22:57:34,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:34,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 22:57:34,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197666022] [2020-09-24 22:57:34,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 22:57:34,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:34,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 22:57:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 22:57:34,069 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-09-24 22:57:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:34,897 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-09-24 22:57:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 22:57:34,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-24 22:57:34,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:34,903 INFO L225 Difference]: With dead ends: 408 [2020-09-24 22:57:34,904 INFO L226 Difference]: Without dead ends: 383 [2020-09-24 22:57:34,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:57:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-24 22:57:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-24 22:57:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 22:57:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-09-24 22:57:34,923 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-09-24 22:57:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:34,924 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-09-24 22:57:34,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 22:57:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-09-24 22:57:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-24 22:57:34,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:34,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:34,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:57:34,931 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-09-24 22:57:34,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:34,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142901985] [2020-09-24 22:57:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:38,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:40,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:40,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-09-24 22:57:40,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:57:40,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5485 [2020-09-24 22:57:40,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:57:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:57:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 22:57:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:40,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:40,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:40,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:40,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 22:57:40,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:40,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:40,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142901985] [2020-09-24 22:57:40,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:40,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:57:40,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614632614] [2020-09-24 22:57:40,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:57:40,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:57:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:57:40,863 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-09-24 22:57:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:41,748 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-09-24 22:57:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 22:57:41,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-24 22:57:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:41,752 INFO L225 Difference]: With dead ends: 425 [2020-09-24 22:57:41,752 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 22:57:41,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:57:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 22:57:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-24 22:57:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-24 22:57:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-09-24 22:57:41,766 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-09-24 22:57:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:41,767 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-09-24 22:57:41,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:57:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-09-24 22:57:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-24 22:57:41,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:41,774 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:41,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:57:41,774 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-09-24 22:57:41,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:41,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960848155] [2020-09-24 22:57:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:41,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:47,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:47,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-09-24 22:57:47,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:57:47,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5744 [2020-09-24 22:57:47,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 22:57:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:57:47,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 22:57:47,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:47,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:47,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:47,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:47,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:47,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 22:57:47,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:47,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:57:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:48,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960848155] [2020-09-24 22:57:48,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:48,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 22:57:48,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620023317] [2020-09-24 22:57:48,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 22:57:48,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 22:57:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 22:57:48,016 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-09-24 22:57:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:49,046 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-09-24 22:57:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 22:57:49,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-24 22:57:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:49,053 INFO L225 Difference]: With dead ends: 442 [2020-09-24 22:57:49,053 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 22:57:49,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 22:57:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 22:57:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-24 22:57:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-24 22:57:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-24 22:57:49,076 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-09-24 22:57:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:49,077 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-24 22:57:49,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 22:57:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-24 22:57:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 22:57:49,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:49,080 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:49,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:57:49,081 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-09-24 22:57:49,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:49,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059975069] [2020-09-24 22:57:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:49,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:51,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:54,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:54,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-09-24 22:57:54,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:57:54,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5411 [2020-09-24 22:57:54,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:57:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:57:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 22:57:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:54,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:57:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:54,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:54,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:57:54,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:57:54,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:57:54,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 22:57:54,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:57:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:57:54,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:57:54,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:57:54,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:57:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:57:54,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059975069] [2020-09-24 22:57:54,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:57:54,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:57:54,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136876451] [2020-09-24 22:57:54,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:57:54,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:57:54,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:57:54,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:57:54,977 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-09-24 22:57:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:57:56,233 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-09-24 22:57:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:57:56,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-24 22:57:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:57:56,237 INFO L225 Difference]: With dead ends: 459 [2020-09-24 22:57:56,237 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 22:57:56,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 22:57:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 22:57:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-24 22:57:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-24 22:57:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-09-24 22:57:56,249 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-09-24 22:57:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:57:56,250 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-09-24 22:57:56,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:57:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-09-24 22:57:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 22:57:56,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:57:56,253 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:57:56,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:57:56,254 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:57:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:57:56,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-09-24 22:57:56,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:57:56,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5289597] [2020-09-24 22:57:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:57:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:57:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:57,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:57:58,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:00,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:01,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:01,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 22:58:01,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 22:58:01,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-09-24 22:58:01,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:01,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 22:58:01,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 22:58:01,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-24 22:58:01,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:01,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:58:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:58:01,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:58:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:58:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:58:01,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5289597] [2020-09-24 22:58:01,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:58:01,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 22:58:01,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329064531] [2020-09-24 22:58:01,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 22:58:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:58:01,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 22:58:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 22:58:01,744 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 11 states. [2020-09-24 22:58:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:58:03,177 INFO L93 Difference]: Finished difference Result 476 states and 479 transitions. [2020-09-24 22:58:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 22:58:03,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-24 22:58:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:58:03,180 INFO L225 Difference]: With dead ends: 476 [2020-09-24 22:58:03,181 INFO L226 Difference]: Without dead ends: 451 [2020-09-24 22:58:03,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 22:58:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-24 22:58:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-24 22:58:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-24 22:58:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2020-09-24 22:58:03,194 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 419 [2020-09-24 22:58:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:58:03,195 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2020-09-24 22:58:03,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 22:58:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2020-09-24 22:58:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-24 22:58:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:58:03,198 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:58:03,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:58:03,199 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:58:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:58:03,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1837327485, now seen corresponding path program 7 times [2020-09-24 22:58:03,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:58:03,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120630854] [2020-09-24 22:58:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:58:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:58:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking...